27 493 181 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 2⁷⁴

TF target 2⁷⁰

P-1

B1 =	320000
B2 =	6640000

Status	Date	User	Residue	Shift	Software
Verified	2005-05-28	Héctor Hernández	92407464738FF845	20377313	Windows,Prime95,v23,(aka WZ1)
Verified	2011-07-04	Reed_Young	92407464738FF845	15463655	Linux 64-bit,Prime95,v25.9,build 4

History

Date	User	Type	Result
2021-09-12	TheJudger	NF	no factor TF: 73-74
2021-08-25	TheJudger	NF	no factor TF: 72-73
2021-08-22	TheJudger	NF	no factor TF: 71-72
2021-03-14	mikr	NF	no factor TF: 70-71
2018-09-21	ramgeis	NF	no factor TF: 69-70
2018-04-19	VictordeHollander	NF	no factor TF: 68-69
2015-08-30	Nesowa	NF	no factor TF: 67-68
2011-07-04	Reed_Young	C-LL	92407464738FF845
2005-05-28	-anonymous-	C-LL	92407464738FF845
2005-04-26	-anonymous-	NF-PM1	B1=320000, B2=6640000
2004-11-22	iPrime	NF	no factor TF: 1-67
2004-09-02	markr	NF	no factor TF: 1-62
2001-08-24	Net_Force	NF	no factor TF: 1-56