84 444 649 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 2⁷⁶

TF target 2⁷⁵

P-1

B1 =	665000
B2 =	12302500

Status	Date	User	Residue	Shift	Software
Verified	2018-09-16	curtisc	FCBDDD2762707A72	79627764	Windows Service,Prime95,v28.7,build 1
Verified	2026-04-07	rick	FCBDDD2762707A72	27921758	FreeBSD 64-bit,Prime95,v28.7,build 1

History

Date	User	Type	Result
2026-04-07	rick	C-LL	FCBDDD2762707A72
2018-09-16	curtisc	C-LL	FCBDDD2762707A72
2017-11-18	arnaud	NF-PM1	B1=665000, B2=12302500
2017-04-24	TheJudger	NF	no factor TF: 74-75
2017-04-24	TheJudger	NF	no factor TF: 75-76
2017-04-24	TheJudger	NF	no factor TF: 73-74
2017-01-28	Judge Hale	NF	no factor TF: 71-72
2017-01-28	Judge Hale	NF	no factor TF: 72-73
2014-08-30	webbert	NF	no factor TF: 70-71
2014-02-15	Ryan Propper	NF	no factor TF: 69-70
2014-02-14	Hobz	NF	no factor TF: 68-69
2013-12-15	Spryte72	NF	no factor TF: 67-68
2013-03-04	Pi_Rho	NF	no factor TF: 66-67
2012-08-21	Carsten Kossendey	NF	no factor TF: 65-66
2010-12-23	Architects Cubed	NF	no factor TF: 64-65