Record history for SP13
Primes Type Digits When Discoverer
x84 • 61# • 2n − 1, n = 0..12 CC, 1st kind 108 20 Jan 2014 Primecoin
x83b • 31# • 2n + 1, n = 0..12 CC, 2nd kind 96 10 Sep 2013 Primecoin
14815550 • 107# + 4385574275277311 + d, d = 2, 6, 8, 12, 18, 20, 26, 30, 32, 36, 42, 48, 50 Tuplet 50 4 Feb 2013 Roger Thompson
61571 • 107# + 4803194122972361 + d, d = 2, 6, 8, 12, 18, 20, 26, 30, 32, 36, 42, 48, 50 Tuplet 48 7 Aug 2009 Jens Kruse Andersen
381955327397348 • 79# + 18393209 + d, d = 2, 8, 14 , 18, 20, 24, 30, 32, 38, 42, 44, 48, 50 Tuplet 46 28 Dec 2007 Norman Luhn
1753286498051 • 71# • 2n − 1, n = 0..12 CC, 1st kind 41 7 Dec 2005 Dirk Augustin, NewPGen, PrimeForm
(938719 • 67# + 56461354019070) • 2n + 1, n = 0..12 CC, 2nd kind 33 May 2004 Jens Kruse Andersen
129017282 • 61# + 3001560376931 + d, d = 0, 2, 6, 8, 12, 18, 20, 26, 30, 32, 36, 42, 48 Tuplet 32 13 Aug 2003 Torbjörn Alm & Jens Kruse Andersen
5953176232124 • 47# + 9564671 + d, d = 0, 2, 6, 8, 12, 18, 20, 26, 30, 32, 36, 42, 48 Tuplet 31 25 Jul 2003 Jens Kruse Andersen
1000000008282508019026959814211 + d, d = 2, 6, 8, 12, 18, 20, 26, 30, 32, 36, 42, 48, 50 Tuplet 31 11 Dec 2000 Jörg Waldvogel & Peter Leikauf

Big constants

x83b = 10756750720700195380397697188448178460115725467111771468875842964723844354555016704

x84 = 106680560818292299253267832484567360951928953599522278361651385665522443588804123392