66 562 303 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 2⁷⁴

P-1

B1 =	590000
B2 =	11210000

Status	Date	User	Residue	Shift	Software
Verified	2015-04-27	Kyle Z Schmidt	C009228B7C5C5A01	50238621	Windows 64-bit,Prime95,v28.5,build 2
Verified	2023-10-05	-anonymous-	C009228B7C5C5A01	63406708	Windows,Prime95,v28.9,build 2

History

Date	User	Type	Result
2023-10-05	-anonymous-	C-LL	C009228B7C5C5A01
2015-04-27	Kyle Z Schmidt	C-LL	C009228B7C5C5A01
2015-03-27	A_Savchenko	NF	no factor TF: 74-75
2014-04-08	Bill Staffen	NF-PM1	B1=590000, B2=11210000
2014-04-03	Matthew P. Del Buono	NF	no factor TF: 73-74
2014-02-26	Tim Sorbera	NF	no factor TF: 72-73
2014-02-26	Tim Sorbera	NF	no factor TF: 71-72
2013-06-14	kracker	NF	no factor TF: 70-71
2012-02-07	E.Lechner	NF	no factor TF: 69-70
2010-01-09	runesk	NF	no factor TF: 68-69
2010-01-08	Sturle Sunde	NF	no factor TF: 67-68
2010-01-07	korva	NF	no factor TF: 66-67
2009-12-26	Rafał	NF	no factor TF: 65-66
2009-12-19	mikael	NF	no factor TF: 64-65
2009-05-17	1997rj7	NF	no factor TF: 1-64