70 752 221 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 =	770000
B2 =	12640000

Status	Date	User	Residue	Shift	Software
Verified	2015-01-27	Kyle Z Schmidt	4E1068524A163860	48557313	Windows 64-bit,Prime95,v28.5,build 2
Verified	2024-08-26	Ryan Propper	4E1068524A163860	46492104	Linux 64-bit,Prime95,v30.7,build 9

History

Date	User	Type	Result
2024-08-26	Ryan Propper	C-LL	4E1068524A163860
2016-11-12	monst	NF	no factor TF: 74-75
2015-01-27	Kyle Z Schmidt	C-LL	4E1068524A163860
2014-10-26	Kyle Z Schmidt	NF-PM1	B1=770000, B2=12640000
2014-10-23	Craig Meyers	NF	no factor TF: 71-74
2013-04-09	Der Grottenolm	NF	no factor TF: 70-71
2012-06-12	-anonymous-	NF	no factor TF: 69-70
2010-03-18	Robert Walker	NF	no factor TF: 68-69
2010-03-10	-anonymous-	NF	no factor TF: 67-68
2010-03-04	-anonymous-	NF	no factor TF: 66-67
2010-02-27	Net_Force	NF	no factor TF: 65-66
2010-02-27	eon_blue_apocalypse	NF	no factor TF: 64-65
2008-11-24	George Woltman	NF	no factor TF: 1-64
2008-11-22	Wojciech Florek	NF	no factor TF: 1-64
2008-11-22	-anonymous-	NF	no factor TF: 1-64
2007-11-17	Amperio	NF	no factor TF: 1-63