26 220 907 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 =	315000
B2 =	8268750

Status	Date	User	Residue	Shift	Software
Verified	2004-12-13	George S. Vaughan	1BA8E5E4EC66CE2D	11621030	Windows,Prime95,v22,(aka WY1)
Verified	2012-05-31	Dubslow	1BA8E5E4EC66CE2D	0	CUDALucas v2.02

History

Date	User	Type	Result
2021-10-17	TheJudger	NF	no factor TF: 74-75
2021-09-30	TheJudger	NF	no factor TF: 73-74
2021-08-26	TheJudger	NF	no factor TF: 72-73
2021-08-26	TheJudger	NF	no factor TF: 71-72
2021-04-15	mikr	NF	no factor TF: 70-71
2017-04-04	ramgeis	NF	no factor TF: 69-70
2012-05-31	Dubslow	C-LL	1BA8E5E4EC66CE2D
2011-11-07	hustensaft	NF	no factor TF: 68-69
2011-10-15	Chuck	NF	no factor TF: 67-68
2004-12-13	George Vaughan	C-LL	1BA8E5E4EC66CE2D
2004-11-03	George Vaughan	NF-PM1	B1=315000, B2=8268750
2004-07-26	kutens	NF	no factor TF: 1-67