22 417 541 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 2⁶⁹

Assignments

Assigned	User	Work Type	Stage	% Done	Updated	Est Complete	Expired
2026-02-24	Tha	PM1-S			2026-04-18	2026-04-24

P-1

B1 =	350000
B2 =	7000000

Status	Date	User	Residue	Shift	Software
Verified	2004-10-03	C. Cooper / S. Boone	7BAC9A96E03D0233	4644816	Windows,Prime95,v23,NT service,(aka WZ5)
Bad	2009-10-25	Reed_Young	7DBDF8B90C3C959F	20878146	Linux 64-bit,Prime95,v25.9,build 4
Verified	2009-11-25	paulie	7BAC9A96E03D0233	9967037	Windows Service,Prime95,v25.8,build 4

History

Date	User	Type	Result
2021-10-31	TheJudger	NF	no factor TF: 74-75
2021-09-19	TheJudger	NF	no factor TF: 73-74
2021-09-06	TheJudger	NF	no factor TF: 72-73
2021-09-06	TheJudger	NF	no factor TF: 71-72
2021-09-06	TheJudger	NF	no factor TF: 70-71
2017-12-12	Tha	NF-PM1	B1=350000, B2=7000000, E=12
2017-05-14	ramgeis	NF	no factor TF: 69-70
2017-05-14	ramgeis	NF	no factor TF: 68-69
2017-05-03	ramgeis	NF	no factor TF: 67-68
2009-11-25	paulie	C-LL	7BAC9A96E03D0233
2009-10-25	Reed_Young	C-LL	7DBDF8B90C3C959F
2004-10-03	curtisc	C-LL	7BAC9A96E03D0233
2004-04-29	curtisc	NF-PM1	B1=325000
2003-08-08	-anonymous-	NF	no factor TF: 1-67