74 997 709 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 =	690000
B2 =	13455000

Status	Date	User	Residue	Shift	Software
Verified	2017-05-18	Evan Scheessele	DBE4F1121A01128A	22434619	Windows 64-bit,Prime95,v28.7,build 1
Verified	2025-03-01	Pavel Bogdanov	DBE4F1121A01128A	5588171	Windows 64-bit,Prime95,v30.19,build 20

History

Date	User	Type	Result
2025-03-01	Pavel Bogdanov	C-LL	DBE4F1121A01128A
2017-05-18	Evan Scheessele	C-LL	DBE4F1121A01128A
2016-04-02	Mark Rose	NF	no factor TF: 61-64
2015-11-07	ktony	NF	no factor TF: 74-75
2015-04-05	Danath	NF-PM1	B1=690000, B2=13455000
2014-08-30	Chuck	NF	no factor TF: 73-74
2014-08-30	Chuck	NF	no factor TF: 72-73
2014-08-30	Chuck	NF	no factor TF: 71-72
2014-08-04	Thomas Bieber	NF	no factor TF: 70-71
2012-10-23	TDH-DXL	NF	no factor TF: 69-70
2010-09-26	Mclighter	NF	no factor TF: 68-69
2010-07-25	Bold_Seeker	NF	no factor TF: 67-68
2010-07-24	Eric Frankenberg	NF	no factor TF: 66-67
2010-07-18	GrunwalderGIMP	NF	no factor TF: 65-66
2010-07-17	DigiK-oz	NF	no factor TF: 64-65
2005-02-12	ramgeis	NF	no factor TF: 1-61
2002-03-31	Alex Kruppa	NF	no factor TF: 1-57