75 170 269 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 =	660000
B2 =	12870000

Status	Date	User	Residue	Shift	Software
Verified	2016-10-08	Per Jessen	4E7F4C2DF0FD41FF	28836312	Linux 64-bit,Prime95,v28.7,build 1
Verified	2025-03-29	Dmitriy Degtiarev	4E7F4C2DF0FD41FF	21148469	Linux 64-bit,Prime95,v30.3,build 6

History

Date	User	Type	Result
2025-03-29	Dmitriy Degtiarev	C-LL	4E7F4C2DF0FD41FF
2016-10-08	Per Jessen	C-LL	4E7F4C2DF0FD41FF
2016-01-06	Superbob	NF-PM1	B1=660000, B2=12870000, E=6
2015-12-25	endless_mike	NF	no factor TF: 74-75
2015-12-25	endless_mike	NF	no factor TF: 73-74
2015-12-25	endless_mike	NF	no factor TF: 72-73
2013-12-23	PascalBieri	NF	no factor TF: 71-72
2013-10-30	CSLatDD	NF	no factor TF: 70-71
2013-05-16	S00030	NF	no factor TF: 69-70
2010-08-07	Sebastian Hornbostel	NF	no factor TF: 68-69
2010-08-05	Bold_Seeker	NF	no factor TF: 67-68
2010-08-04	SAHS Science Dept	NF	no factor TF: 66-67
2010-08-02	DRH	NF	no factor TF: 65-66
2010-07-31	Bold_Seeker	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
2004-12-13	Marzbug	NF	no factor TF: 1-64
2003-07-21	Marzbug	NF	no factor TF: 1-63