25 947 587 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 =	1354000
B2 =	2360122380

Status	Date	User	Residue	Shift	Software
Bad	2005-12-12	Ian Bucklar	B0A7838E277B8F98	1498933	Windows,Prime95,v23,(aka WZ1)
Verified	2012-06-25	Dubslow	D305A218BB956692	24379347	Linux 64-bit,Prime95,v27.7,build 2
Verified	2012-06-25	LaurV	D305A218BB956692	0	CUDALucas v2.03
Verified	2019-04-20	MadPoo 🙂	D305A218BB956692	6607969	Windows 64-bit,Prime95,v29.4,(aka Wg4)

History

Date	User	Type	Result
2025-12-17	Jason Lynch	NF-PM1	B1=1354000, B2=2360122380
2021-10-17	TheJudger	NF	no factor TF: 74-75
2021-09-19	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
2021-07-23	mikr	NF	no factor TF: 70-71
2019-04-20	MadPoo 🙂	C-LL	D305A218BB956692
2017-03-28	ramgeis	NF	no factor TF: 69-70
2012-06-25	LaurV	C-LL	D305A218BB956692
2012-06-25	Dubslow	C-LL	D305A218BB956692
2012-06-18	Axelsson	NF	no factor TF: 68-69
2012-06-18	Axelsson	NF	no factor TF: 67-68
2005-12-12	-anonymous-	C-LL	B0A7838E277B8F98
2005-02-12	-anonymous-	NF-PM1	B1=245000, B2=1163750
2004-06-21	-anonymous-	NF	no factor TF: 1-67
2004-04-29	-anonymous-	NF	no factor TF: 1-62
2001-08-12	Net_Force	NF	no factor TF: 1-56