62 387 881 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 2⁷⁴

P-1

B1 =	550000
B2 =	10587500

Status	Date	User	Residue	Shift	Software
Verified	2014-04-07	Kyle Z Schmidt	8CE7029F989EF9C2	43524630	Windows 64-bit,Prime95,v27.9,build 1
Verified	2021-12-23	BSGS	8CE7029F989EF9C2	5277356	Windows 64-bit,Prime95,v28.5,build 2

History

Date	User	Type	Result
2021-12-23	BSGS	C-LL	8CE7029F989EF9C2
2016-02-23	Mark Rose	NF	no factor TF: 59-63
2014-04-07	Kyle Z Schmidt	C-LL	8CE7029F989EF9C2
2013-07-02	Bdot	NF-PM1	B1=550000, B2=10587500, E=6
2013-06-10	A_Savchenko	NF	no factor TF: 73-74
2013-03-22	Son Johan	NF	no factor TF: 72-73
2013-03-22	Son Johan	NF	no factor TF: 71-72
2012-09-05	rduerr	NF	no factor TF: 69-71
2010-01-10	-anonymous-	NF	no factor TF: 68-69
2009-11-01	gbvalor	NF	no factor TF: 67-68
2009-08-22	sannerud.com	NF	no factor TF: 66-67
2009-08-15	sannerud.com	NF	no factor TF: 65-66
2009-02-16	Idan_Shifres	NF	no factor TF: 64-65
2008-12-12	Derek	NF	no factor TF: 63-64
2003-07-06	Gordon Spence	NF	no factor TF: 1-59