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Term: n • 2n - 1 Total: 34 Reference: PrimePages and others |
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| Number | Digits | When? | Who? |
|---|---|---|---|
| 17016602 • 217016602 - 1 | 5122515 | Mar 2018 | Diego Bertolotti, PrimeGrid |
| 3752948 • 23752948 - 1 | 1129757 | Dec 2007 | Matthew J Thompson, PrimeGrid |
| 2367906 • 22367906 - 1 | 712818 | Sep 2007 | Stephen Kohlman, PrimeGrid |
| 2013992 • 22013992 - 1 | 606279 | Aug 2007 | Lasse Mejling Andersen, PrimeGrid |
| 1467763 • 21467763 - 1 | 441847 | Jun 2007 | Zsuzsi Mate, Willem Siemelink, PrimeGrid |
| 1268979 • 21268979 - 1 | 382007 | Jan 2007 | Willem Siemelink |
| 1195203 • 21195203 - 1 | 359799 | Jul 2005 | Mark Rodenkirch |
| 667071 • 2667071 - 1 | 200815 | Sep 2000 | Manfred Toplic |
| 151023 • 2151023 - 1 | 45468 | May 1998 | Kevin O'Hare |
| 143018 • 2143018 - 1 | 43058 | Apr 1998 | Ray Ballinger |
| 98726 • 298726 - 1 | 29725 | May 1997 | Jeffrey Young |
| 23005 • 223005 - 1 | 6930 | May 1997 | Jeffrey Young |
| 22971 • 222971 - 1 | 6920 | May 1997 | Jeffrey Young |
| 18885 • 218885 - 1 | 5690 | Dec 1987 | Wilfrid Keller |
| 15822 • 215822 - 1 | 4768 | Dec 1987 | Wilfrid Keller |
| 12379 • 212379 - 1 | 3731 | Dec 1984 | Wilfrid Keller |
| 9531 • 29531 - 1 | 2871 | Dec 1984 | Wilfrid Keller |
| 7755 • 27755 - 1 | 2339 | Dec 1984 | Wilfrid Keller |
| 5312 • 25312 - 1 | 1603 | Dec 1984 | Wilfrid Keller |
| 822 • 2822 - 1 | 251 | - | - |
| 751 • 2751 - 1 | 229 | - | - |
| 512 • 2512 - 1 | 157 | - | - |
| 462 • 2462 - 1 | 142 | - | - |
| 384 • 2384 - 1 | 119 | - | - |
| 362 • 2362 - 1 | 112 | - | - |
| 249 • 2249 - 1 | 78 | - | - |
| 123 • 2123 - 1 | 40 | - | - |
| 115 • 2115 - 1 | 37 | - | - |
| 81 • 281 - 1 | 27 | - | - |
| 75 • 275 - 1 | 25 | - | - |
| 30 • 230 - 1 | 11 | - | - |
| 6 • 26 - 1 | 3 | - | - |
| 3 • 23 - 1 | 2 | - | - |
| 2 • 22 - 1 | 1 | - | - |