25 217 947 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 =	425000
B2 =	25176000

Status	Date	User	Residue	Shift	Software
Verified	2004-11-22	J. Pflug	0CF0F83412E69713	5628367	Windows,Prime95,v23,(aka WZ1)
Verified	2012-01-12	Reed_Young	0CF0F83412E69713	19892979	Linux 64-bit,Prime95,v26.6,build 3

History

Date	User	Type	Result
2022-12-25	Naegi Makoto	NF	no factor TF: 72-73
2021-10-07	Dylan Delgado	NF-PM1	B1=425000, B2=25176000
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
2012-01-12	Reed_Young	C-LL	0CF0F83412E69713
2011-12-07	garo	NF	no factor TF: 68-69
2011-12-07	garo	NF	no factor TF: 67-68
2004-11-30	-anonymous-	NF-PM1	B1=375000
2004-11-22	-anonymous-	C-LL	0CF0F83412E69713
2004-11-22	-anonymous-	NF-PM1	B1=375000
2004-08-06	Lawrence V. Castiglione III	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