26 558 761 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 2⁷⁰

P-1

B1 =	315000
B2 =	7481250

Status	Date	User	Residue	Shift	Software
Verified	2004-12-23	Reno	F28D2939AA3585C9	26212535	Windows,Prime95,v23,(aka WZ1)
Verified	2011-08-09	Reed_Young	F28D2939AA3585C9	25334247	Linux 64-bit,Prime95,v25.9,build 4

History

Date	User	Type	Result
2021-10-17	TheJudger	NF	no factor TF: 74-75
2021-09-26	TheJudger	NF	no factor TF: 73-74
2021-08-25	TheJudger	NF	no factor TF: 72-73
2021-08-25	TheJudger	NF	no factor TF: 71-72
2021-05-04	mikr	NF	no factor TF: 70-71
2018-05-25	VictordeHollander	NF	no factor TF: 69-70
2018-03-26	VictordeHollander	NF	no factor TF: 68-69
2016-12-09	NR	NF	no factor TF: 67-68
2011-08-09	Reed_Young	C-LL	F28D2939AA3585C9
2004-12-23	-anonymous-	C-LL	F28D2939AA3585C9
2004-12-13	-anonymous-	NF-PM1	B1=315000, B2=7481250
2004-11-30	-anonymous-	NF	no factor TF: 1-67
2004-07-13	-anonymous-	NF	no factor TF: 1-62