72 601 523 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 =	625000
B2 =	12500000

Status	Date	User	Residue	Shift	Software
Verified	2015-09-26	Kyle Z Schmidt	85D85B4488DB482B	58305357	Windows 64-bit,Prime95,v28.5,build 2
Verified	2024-04-07	Fabrice Bellet	85D85B4488DB482B	49602841	Linux 64-bit,Prime95,v30.8,build 18

History

Date	User	Type	Result
2024-04-07	Fabrice Bellet	C-LL	85D85B4488DB482B
2016-04-01	Mark Rose	NF	no factor TF: 57-64
2015-09-26	Kyle Z Schmidt	C-LL	85D85B4488DB482B
2015-08-16	TheJudger	NF-PM1	B1=625000, B2=12500000, E=12
2015-08-02	TheJudger	NF	no factor TF: 74-75
2015-08-02	TheJudger	NF	no factor TF: 73-74
2015-08-02	TheJudger	NF	no factor TF: 72-73
2015-03-07	srow7	NF	no factor TF: 71-72
2013-03-03	-anonymous-	NF	no factor TF: 70-71
2012-09-30	Cow_tipping	NF	no factor TF: 69-70
2010-12-27	Per Jessen	NF	no factor TF: 68-69
2010-12-18	tmorrow	NF	no factor TF: 67-68
2010-10-12	ANONYMOUS	NF	no factor TF: 66-67
2010-10-11	ANONYMOUS	NF	no factor TF: 65-66
2010-05-20	GrunwalderGIMP	NF	no factor TF: 64-65
2002-05-25	Joss	NF	no factor TF: 1-57