63 483 857 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 =	890000
B2 =	19580000

Status	Date	User	Residue	Shift	Software
Verified	2014-08-26	Kyle Z Schmidt	195DE09FB71C4009	11298428	Windows 64-bit,Prime95,v27.9,build 1
Verified	2021-08-17	-anonymous-	195DE09FB71C4009	33539016	Mac OS X 64-bit,Prime95,v29.8,build 7

History

Date	User	Type	Result
2021-08-17	-anonymous-	C-LL	195DE09FB71C4009
2016-02-23	Mark Rose	NF	no factor TF: 59-63
2014-08-26	Kyle Z Schmidt	C-LL	195DE09FB71C4009
2013-09-30	Jerry Hallett	NF-PM1	B1=890000, B2=19580000, E=12
2013-09-28	RichD0	NF	no factor TF: 73-74
2013-06-01	TheJudger	NF	no factor TF: 72-73
2013-06-01	TheJudger	NF	no factor TF: 71-72
2012-08-20	SWL551	NF	no factor TF: 70-71
2012-05-16	gregor	NF	no factor TF: 69-70
2010-07-21	ITS	NF	no factor TF: 68-69
2010-07-16	ITS	NF	no factor TF: 67-68
2010-07-12	ITS	NF	no factor TF: 66-67
2009-03-07	SMoffat	NF	no factor TF: 65-66
2009-02-27	-anonymous-	NF	no factor TF: 64-65
2009-02-22	Wojciech Florek	NF	no factor TF: 63-64
2003-07-30	Gordon Spence	NF	no factor TF: 1-59
1999-11-17	-anonymous-	NF	no factor TF: 1-50