75 191 447 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 =	640000
B2 =	11840000

Status	Date	User	Residue	Shift	Software
Verified	2016-10-30	Drgoodest	AD153311B59EE683	45704067	Windows 64-bit,Prime95,v28.7,build 1
Verified	2025-03-28	Pavel Bogdanov	AD153311B59EE683	66968091	Windows 64-bit,Prime95,v30.19,build 20

History

Date	User	Type	Result
2025-03-28	Pavel Bogdanov	C-LL	AD153311B59EE683
2016-10-30	Drgoodest	C-LL	AD153311B59EE683
2016-01-04	ixfd64	NF-PM1	B1=640000, B2=11840000
2015-12-31	TheJudger	NF	no factor TF: 74-75
2015-12-31	TheJudger	NF	no factor TF: 73-74
2015-12-19	Bdot	NF	no factor TF: 72-73
2015-08-31	Judge Hale	NF	no factor TF: 71-72
2014-02-20	arnaud	NF	no factor TF: 70-71
2012-12-05	Jay	NF	no factor TF: 69-70
2010-12-21	oilwarzonedotcom	NF	no factor TF: 68-69
2010-12-13	-anonymous-	NF	no factor TF: 67-68
2010-12-12	-anonymous-	NF	no factor TF: 66-67
2010-12-12	Craig Meyers	NF	no factor TF: 65-66
2010-08-04	-anonymous-	NF	no factor TF: 64-65
2005-02-12	Marzbug	NF	no factor TF: 1-64
2005-01-10	Marzbug	NF	no factor TF: 1-64
2004-12-23	Marzbug	NF	no factor TF: 1-64
2003-07-30	Marzbug	NF	no factor TF: 1-63