25 147 223 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 2⁷⁴

TF target 2⁷⁰

P-1

B1 =	1722000
B2 =	1815491370

Status	Date	User	Residue	Shift	Software
Verified	2004-09-02	C. Cooper / S. Boone	BFD00190D3873900	7977	Windows,Prime95,v23,NT service,(aka WZ5)
Verified	2011-05-29	Reed_Young	BFD00190D3873900	36586	Linux 64-bit,Prime95,v25.9,build 4

History

Date	User	Type	Result
2024-03-10	James Heinrich	NF-PM1	B1=1722000, B2=1815491370
2021-09-13	TheJudger	NF	no factor TF: 73-74
2021-08-28	TheJudger	NF	no factor TF: 72-73
2021-08-28	TheJudger	NF	no factor TF: 71-72
2021-06-06	mikr	NF	no factor TF: 70-71
2017-06-11	ramgeis	NF	no factor TF: 68-69
2017-06-11	ramgeis	NF	no factor TF: 69-70
2015-12-28	VictordeHollander	NF	no factor TF: 67-68
2011-05-29	Reed_Young	C-LL	BFD00190D3873900
2004-09-02	curtisc	C-LL	BFD00190D3873900
2004-08-06	curtisc	NF-PM1	B1=375000
2004-04-09	Michael Hanscho	NF	no factor TF: 1-67
2003-12-13	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