75 075 509 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 =	12656250

Status	Date	User	Residue	Shift	Software
Verified	2016-04-25	Kyle Z Schmidt	BDC9A7D3833C0386	29062771	Windows 64-bit,Prime95,v28.7,build 1
Verified	2025-02-12	Jon Pace	BDC9A7D3833C0386	24283926	Windows Service,Prime95,v30.7,build 8

History

Date	User	Type	Result
2025-02-12	Jon Pace	C-LL	BDC9A7D3833C0386
2016-04-25	Kyle Z Schmidt	C-LL	BDC9A7D3833C0386
2015-04-09	Nesowa	NF-PM1	B1=625000, B2=12656250, E=12
2015-04-03	Nesowa	NF	no factor TF: 74-75
2014-11-07	Sebastian Hornbostel	NF	no factor TF: 73-74
2013-12-27	processinfo	NF	no factor TF: 72-73
2013-12-27	processinfo	NF	no factor TF: 71-72
2013-12-27	processinfo	NF	no factor TF: 70-71
2013-10-28	SMoffat	NF	no factor TF: 69-70
2010-08-10	Helmut Zulus	NF	no factor TF: 68-69
2010-08-05	Helmut Zulus	NF	no factor TF: 67-68
2010-08-01	GrunwalderGIMP	NF	no factor TF: 66-67
2010-07-31	Martin Prusa	NF	no factor TF: 65-66
2004-12-23	Marzbug	NF	no factor TF: 1-65
2004-07-02	Marzbug	NF	no factor TF: 1-65