25 208 353 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 2⁷³

TF target 2⁷⁰

P-1

B1 =	424000
B2 =	25166000

Status	Date	User	Residue	Shift	Software
Verified	2005-11-01	Ars Technica Team Prime Rib	4A2052C8DD802647	18791562	Windows,Prime95,v24 final,(aka Wc1)
Bad	2011-07-03	ahrensburg	02F8D2E32EDF9648	9192227	Windows,Prime95,v25.8,build 5
Verified	2012-01-07	Dubslow	4A2052C8DD802647	4974042	Windows 64-bit,Prime95,v26.6,build 3

History

Date	User	Type	Result
2021-08-27	Dylan Delgado	NF-PM1	B1=424000, B2=25166000
2021-01-09	-anonymous-	NF	no factor TF: 72-73
2021-01-08	-anonymous-	NF	no factor TF: 70-71
2021-01-08	-anonymous-	NF	no factor TF: 71-72
2017-03-19	ramgeis	NF	no factor TF: 69-70
2012-01-07	Dubslow	C-LL	4A2052C8DD802647
2011-11-25	bcp19	NF	no factor TF: 68-69
2011-11-24	Chuck	NF	no factor TF: 67-68
2011-07-03	ahrensburg	C-LL	02F8D2E32EDF9648
2005-11-01	Team Prime Rib	C-LL	4A2052C8DD802647
2004-12-13	-anonymous-	NF-PM1	B1=375000
2004-04-20	Torchwood Institute	NF	no factor TF: 1-67
2003-12-31	markr	NF	no factor TF: 1-62
2001-08-24	Matt	NF	no factor TF: 1-58
2001-08-12	Net_Force	NF	no factor TF: 1-56