| k | Digits | Early discovery with at least 100 digits | Who | When | 1 | 157 | 2521 − 1 | Raphael Mitchel Robinson | 30 Jan 1952 |
| 2 | 221 | 213 • 2726 ± 1 | Wilfrid Keller | ≤ 1980 |
| 3-5 | - | No reliable information | - | - |
| 6 | 133 | 2 • 10132 + 75543532187 + d, d = 0, 4, 6, 10, 12, 16 | Tony Forbes | Apr 1994 |
| 7 | 104 | 4293326603 • 233# + 399389 + d, d = 0, 2, 8, 12, 14, 18, 20 | Radoslaw Naleczynski | 31 Dec 1998 |
| 8 | 110 | 388793398651 • 241# + 1042090781 + d, d = 0, 2, 6, 8, 12, 18, 20, 26 | Norman Luhn | 23 Feb 2001 |
| 9 | 110 | 388793398651 • 241# + 1042090781 + d, d = 0, 2, 6, 8, 12, 18, 20, 26, 30 | Norman Luhn | 23 Feb 2001 |
| 10 | 103 | 72613488698235 • 227# + 39058751 + d, d = 0, 2, 6, 8, 12, 18, 20, 26, 30, 32 | Norman Luhn | 11 Apr 2004 |
| 11 | 104 | 24698258 • 239# + 28606476153371 + d, d = 0, 2, 6, 8, 12, 18, 20, 26, 30, 32, 36 | Norman Luhn & Jens Kruse Andersen | 18 Aug 2004 |
| 12 | 108 | 13243795731372733191902494675154142263612189966992593522251560981597803197621024152571147501 + 27407861785763183 • 229# + d, d = 0, 2, 6, 8, 12, 18, 20, 26, 30, 32, 36, 42 |
Peter Kaiser, David Stevens, Polysieve, PFGW, Primo |
23 Sep 2019 |
| k | Digits | Early discovery with at least 200 digits | Who | When | 1 | 386 | 21279 − 1 | Raphael Mitchel Robinson | 25 Jun 1952 |
| 2 | 221 | 213 • 2726 ± 1 | Wilfrid Keller | ≤ 1980 |
| 3 | - | No reliable information | - | - |
| 4 | 241 | 2800 + 10169432335 + d, d = 0, 2, 6, 8 | Tony Forbes | 1994 |
| 5 | 232 | 2768 + 108676793455855 + d, d = 0, 2, 6, 8, 12 | Tony Forbes | 1997 |
| 6 | 213 | 1189609319 • 503# / 613777 + 446215867 + d, d = 0, 4, 6, 10, 12, 16 | Michael Bell | 12 Sep 2000 |
| 7 | 219 | 1839198074074 • 499# + 165701 + d, d = 0, 2, 6, 8, 12, 18, 20 | Norman Luhn | 14 Jun 2004 |
| 8 | 206 | 12874261020824 • 463# + 88793 + d, d = 0, 6, 8, 14, 18, 20, 24, 26 | Norman Luhn | 6 Aug 2005 |
| 9 | 203 | 663579549486449 • 457# + 1277 + d, d = 0, 2, 6, 12, 14, 20, 24, 26, 30 | Norman Luhn | 16 Mar 2017 |
| 10 | 269 | 290901656335108169864195656135043662615199446375386143995339722400236057821426952579658098504166333411889 • 401# + 380284918609481 + d, d = 0, 2, 6, 8, 12, 18, 20, 26, 30, 32 |
Riecoin #1551825 | 27 Jul 2021 |
| k | Digits | Early discovery with at least 300 digits | Who | When | 1 | 386 | 21279 − 1 | Raphael Mitchel Robinson | 25 Jun 1952 |
| 2 | 313 | 177 • 21032 ± 1 | Wilfrid Keller | ≤ 1980 |
| 3 | 305 | 10304 + 835642263 + d, d = 0, 4, 6 | Tony Forbes | 1994 |
| 4 | 318 | 21056 + 1301655396715 + d, d = 0, 2, 6, 8 | Tony Forbes | 1994 |
| 5 | 318 | 3188356293605443904 • (2993 − 2331) − 6 • 2331 − 7 + d, d = 0, 2, 6, 8, 12 | Tony Forbes | 3 Feb 1999 |
| 6 | 301 | 110282080125 • 691# + 6005887 + d, d = 0, 4, 6, 10, 12, 16 | Norman Luhn | 18 Oct 2001 |
| 7 | 301 | 68841237 • 701# + 2525568581 + d, d = 0, 2, 6, 8, 12, 18, 20 | Jens Kruse Andersen | 24 Jun 2009 |
| 8 | 304 | 359378518392551 • 691# + 23983691 + d, d = 0, 2, 6, 8, 12, 18, 20, 26 | Norman Luhn | 4 Jul 2017 |
| 9 | 302 | 3662943827507055653453285926700023101620402654194921037456914703634367453333223968004841750810165461896894501 • 463# + 2325810733931801 + d, d = 0, 2, 6, 8, 12, 18, 20, 26, 30 |
Riecoin #1567399 | 22 Aug 2021 |
| k | Digits | Early discovery with at least 400 digits | Who | When | 1 | 664 | 22203 − 1 | Raphael Mitchel Robinson | 7 Oct 1952 |
| 2 | 401 | 1065 • 21321 ± 1 | Wilfrid Keller | ≤ 1980 |
| 3 | 401 | 4 • 10400 + 6368335473 + d, d = 0, 4, 6 | Tony Forbes | 1994 |
| 4 | 400 | 10399 + 34993836001 + d, d = 0, 2, 6, 8 | Warut Roonguthai | 1995 |
| 5 | 427 | 63687452535 • 997# + 1002054791 + d, d = 0, 2, 6, 8, 12 | Norman Luhn | 7 May 2001 |
| 6 | 427 | 328481121285 • 997# + 16057 + d, d = 0, 4, 6, 10, 12, 16 | Norman Luhn | 17 Jan 2006 |
| 7 | 402 | 4733578067069 • 937# + 626609 + d, d = 0, 2, 8, 12, 14, 18, 20 | Norman Luhn | 9 May 2016 |
| 8 | 401 | 362079385668757696008683096558661746463 • 863# + 114023297140211 + d, d = 0, 2, 6, 8, 12, 18, 20, 26 | Michalis Christou, rieMiner 0.93a | 10 Sep 2023 |
| k | Digits | Early discovery with at least 500 digits | Who | When | 1 | 664 | 22203 − 1 | Raphael Mitchel Robinson | 7 Oct 1952 |
| 2 | 703 | 1159142985 • 22304 ± 1 | A. Oliver L. Atkin, Neil W. Rickert | ≤ 1980 |
| 3 | 501 | 21664 + 3405302217 + d, d = 0, 4, 6 | Tony Forbes | 1994 |
| 4 | 500 | 10499 + 883750143961 + d, d = 0, 2, 6, 8 | Warut Roonguthai | 1996 |
| 5 | 511 | 19685846183 • 1193# + 6005891 + d, d = 0, 2, 6, 8, 12 | Norman Luhn | 12 May 2002 |
| 6 | 559 | 601545895935 • 1297# + 43777 + d, d = 0, 4, 6, 10, 12, 16 | Norman Luhn | 1 May 2009 |
| 7 | 515 | 115828580393941 • 1193# + 5132201 + d, d = 0, 2, 6, 8, 12, 18, 20 | Norman Luhn | 18 Jan 2018 |
| k | Digits | Early discovery with at least 600 digits | Who | When | 1 | 664 | 22203 − 1 | Raphael Mitchel Robinson | 7 Oct 1952 |
| 2 | 703 | 1159142985 • 22304 ± 1 | A. Oliver L. Atkin, Neil W. Rickert |
≤ 1980 |
| 3 | 607 | 22016 + 2294808807 + d, d = 0, 4, 6 | Tony Forbes | 1994 |
| 4 | 600 | 10599 + 1394283756151 + d, d = 0, 2, 6, 8 | Warut Roonguthai | 1997 |
| 5 | 1034 | 31969211688 • 2399# + 16061 d, d = 0, 2, 6, 8, 12 | Norman Luhn | 30 Jul 2002 |
| 6 | 600 | 87003251366129271320172297260820165414512118488760301556398626498188491456463582776862739687819998728687224597 77111857484469717539832807076297111542315726310535662300842764788602322720764454726099366003147113599912743519 74702131352485721383899217353564548777480382292260041833362039710076475709098424235499491861853827976762822552 24158287242481391522282240117490588685419026728 • 547# + 7187767 + d, d = 0, 4, 6, 10, 12, 16 |
Vidar Nakling | 6 Oct 2014 |
| 7 | 1002 | 113225039190926127209 • 2339# / 57057 + 1 + d, d = 0, 2, 6, 8, 12, 18, 20 | Peter Kaiser | 27 Jan 2021 |
| k | Digits | Early discovery with at least 700 digits | Who | When | 1 | 969 | 23217 − 1 | Hans Riesel | 8 Sep 1957 |
| 2 | 703 | 1159142985 • 22304 ± 1 | A. Oliver L. Atkin, Neil W. Rickert |
≤ 1980 |
| 3 | 723 | 22400 + 14906370057 + d, d = 0, 4, 6 | Tony Forbes | 1994 |
| 4 | 700 | 10699 + 547634621251 + d, d = 0, 2, 6, 8 | Warut Roonguthai | 1998 |
| 5 | 1034 | 31969211688 • 2399# + 16061 + d, d = 0, 2, 6, 8, 12 | Norman Luhn | 30 Jul 2002 |
| 6 | 700 | 39192012090354765012032937869636204461831938640723950845316702443917898504549879060031029893124507801166514148 87182211444027280088419855460746204272350986699510804164529870078499691992151722541551955298630979698530841904 53728650037452220380184681391570092753684727879715473377537 • 1013# + 6503587 + d, d = 0, 4, 6, 10, 12, 16 |
Vidar Nakling | 23 Jan 2015 |
| 7 | 1002 | 113225039190926127209 • 2339# / 57057 + 1 + d, d = 0, 2, 6, 8, 12, 18, 20 | Peter Kaiser | 27 Jan 2021 |
| k | Digits | Early discovery with at least 800 / 900 digits | Who | When | 1 | 969 | 23217 − 1 | Hans Riesel | 8 Sep 1957 |
| 2 | 1040 | 256200945 • 23426 ± 1 | Arthur Oliver Lonsdale Atkin, Neil W. Rickert | Dec 1980 |
| 3 | 1083 | 437850590 • (23567 − 21189) − 6 • 21189 − 5 + d, d = 0, 4, 6 | Tony Forbes | Dec 1996 |
| 4 | 1004 | 76912895956636885 • (23279 − 21093) − 6 • 21093 − 7 + d, d = 0, 2, 6, 8 | Tony Forbes | 16 Sep 1998 |
| 5 | 1034 | 31969211688 • 2399# + 16061 + d, d = 0, 2, 6, 8, 12 | Norman Luhn | 30 Jul 2002 |
| 6 | 1037 | 28993093368077 • 2399# + 19417 + d, d = 0, 4, 6, 10, 12, 16 | Norman Luhn | 14 Mar 2016 |
| 7 | 1002 | 113225039190926127209 • 2339# / 57057 + 1 + d, d = 0, 2, 6, 8, 12, 18, 20 | Peter Kaiser | 27 Jan 2021 |