56 446 063 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 2⁷³

P-1

B1 =	675000
B2 =	21093750

Status	Date	User	Residue	Shift	Software
Verified	2012-12-10	curtisc	FB38E8FD9098B934	2848645	Windows Service,Prime95,v27.7,build 2
Verified	2021-05-31	Dubslow	FB38E8FD9098B934	39274352	Linux 64-bit,Prime95,v29.8,build 6

History

Date	User	Type	Result
2021-05-31	Dubslow	C-LL	FB38E8FD9098B934
2019-02-03	TheJudger	NF	no factor TF: 73-74
2016-02-23	Mark Rose	NF	no factor TF: 58-63
2016-01-10	-anonymous-	NF	no factor TF: 72-73
2012-12-10	curtisc	C-LL	FB38E8FD9098B934
2011-11-12	TheJudger	NF	no factor TF: 69-72
2011-10-12	GrunwalderGIMP	NF	no factor TF: 68-69
2011-10-10	KC	NF-PM1	B1=675000, B2=21093750, E=12
2009-11-19	Sturle Sunde	NF	no factor TF: 67-68
2008-07-29	Sturle Sunde	NF	no factor TF: 66-67
2008-07-28	Sturle Sunde	NF	no factor TF: 65-66
2008-07-27	Sturle Sunde	NF	no factor TF: 64-65
2008-07-26	Sturle Sunde	NF	no factor TF: 63-64
2002-10-07	-anonymous-	NF	no factor TF: 1-58
2001-09-22	-anonymous-	NF	no factor TF: 1-57
2000-06-11	-anonymous-	NF	no factor TF: 1-56
2000-03-08	-anonymous-	NF	no factor TF: 1-54
2000-01-19	-anonymous-	NF	no factor TF: 1-53
1999-12-15	-anonymous-	NF	no factor TF: 1-53