26 698 213 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Details

Composite: proven not-prime with Lucas-Lehmer test

No factors below 2⁷⁵

TF target 2⁷⁰

P-1

B1 =	1923076
B2 =	1857401910

Status	Date	User	Residue	Shift	Software
Verified	2006-01-15	C. Cooper / S. Boone	DE5204019AA5C4C3	13411152	Windows,Prime95,v23,NT service,(aka WZ5)
Verified	2012-08-01	Dubslow	DE5204019AA5C4C3	21911721	Linux 64-bit,Prime95,v27.7,build 2

History

Date	User	Type	Result
2025-01-03	timc995	NF-PM1	B1=1923076, B2=1857401910
2021-10-17	TheJudger	NF	no factor TF: 74-75
2021-09-19	TheJudger	NF	no factor TF: 73-74
2021-08-24	TheJudger	NF	no factor TF: 72-73
2021-08-24	TheJudger	NF	no factor TF: 71-72
2019-09-27	-anonymous-	NF	no factor TF: 70-71
2017-04-12	ramgeis	NF	no factor TF: 69-70
2012-08-01	Dubslow	C-LL	DE5204019AA5C4C3
2012-01-05	firejuggler	NF	no factor TF: 68-69
2011-10-28	Chuck	NF	no factor TF: 67-68
2006-01-15	curtisc	C-LL	DE5204019AA5C4C3
2004-12-13	-anonymous-	NF-PM1	B1=405000
2004-09-02	-anonymous-	NF	no factor TF: 1-67
2004-07-02	-anonymous-	NF	no factor TF: 1-62
2004-06-21	-anonymous-	NF	no factor TF: 1-61