72 471 761 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 =	620000
B2 =	12090000

Status	Date	User	Residue	Shift	Software
Verified	2015-11-04	Kyle Z Schmidt	1BCAD8F5DCF5CC91	18487058	Windows 64-bit,Prime95,v28.5,build 2
Verified	2024-04-12	Dwscdv3	1BCAD8F5DCF5CC91	49453167	Windows 64-bit,Prime95,v30.19,build 13

History

Date	User	Type	Result
2024-04-12	Dwscdv3	C-LL	1BCAD8F5DCF5CC91
2015-11-04	Kyle Z Schmidt	C-LL	1BCAD8F5DCF5CC91
2015-04-05	TheJudger	NF-PM1	B1=620000, B2=12090000, E=6
2015-03-21	electron1897	NF	no factor TF: 74-75
2015-03-21	electron1897	NF	no factor TF: 73-74
2015-03-21	electron1897	NF	no factor TF: 72-73
2015-03-21	electron1897	NF	no factor TF: 71-72
2013-04-13	apocalypse	NF	no factor TF: 70-71
2012-11-23	TDH-DXL	NF	no factor TF: 69-70
2010-09-01	stampsfan92	NF	no factor TF: 68-69
2010-08-29	David L	NF	no factor TF: 67-68
2010-08-26	ekrumme	NF	no factor TF: 66-67
2010-05-21	alan145	NF	no factor TF: 65-66
2010-05-19	GrunwalderGIMP	NF	no factor TF: 64-65
2008-09-19	Wojciech Florek	NF	no factor TF: 1-64
2002-05-18	Joss	NF	no factor TF: 1-57