63 028 409 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 2⁷⁴

P-1

B1 =	565000
B2 =	11300000

Status	Date	User	Residue	Shift	Software
Verified	2013-08-30	Kyle Z Schmidt	B55F6D0B4B3F59A5	63012840	Windows 64-bit,Prime95,v27.9,build 1
Verified	2022-11-28	rangkloic	B55F6D0B4B3F59A5	57901250	Windows 64-bit,Prime95,v28.10,build 1

History

Date	User	Type	Result
2024-05-30	LaurV	NF	no factor TF: 70-71
2022-11-28	rangkloic	C-LL	B55F6D0B4B3F59A5
2016-02-23	Mark Rose	NF	no factor TF: 59-63
2013-08-30	Kyle Z Schmidt	C-LL	B55F6D0B4B3F59A5
2013-06-09	TheJudger	NF-PM1	B1=565000, B2=11300000, E=12
2013-04-14	TheJudger	NF	no factor TF: 72-73
2013-04-14	TheJudger	NF	no factor TF: 73-74
2013-04-14	TheJudger	NF	no factor TF: 71-72
2013-03-22	Carsten Kossendey	NF	no factor TF: 70-71
2012-01-10	-anonymous-	NF	no factor TF: 69-70
2009-11-23	sbimone	NF	no factor TF: 68-69
2009-11-22	sbimone	NF	no factor TF: 67-68
2009-11-21	TechJones	NF	no factor TF: 66-67
2009-09-12	Dirk-HRO	NF	no factor TF: 65-66
2009-09-05	arnaud	NF	no factor TF: 64-65
2009-02-09	Wojciech Florek	NF	no factor TF: 63-64
2003-07-21	Gordon Spence	NF	no factor TF: 1-59
1999-11-17	-anonymous-	NF	no factor TF: 1-51