68 417 623 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 2⁷⁷

TF target 2⁷⁴

P-1

B1 =	625000
B2 =	12812500

Status	Date	User	Residue	Shift	Software
Verified	2016-02-08	Kyle Z Schmidt	E2476DE3E76F4ABD	54923005	Windows 64-bit,Prime95,v28.5,build 2
Verified	2023-08-13	Ryan Propper	E2476DE3E76F4ABD	52462676	Linux 64-bit,Prime95,v30.7,build 9

History

Date	User	Type	Result
2023-08-13	Ryan Propper	C-LL	E2476DE3E76F4ABD
2020-09-22	-anonymous-	NF	no factor TF: 76-77
2020-09-20	-anonymous-	NF	no factor TF: 75-76
2016-02-08	Kyle Z Schmidt	C-LL	E2476DE3E76F4ABD
2016-01-14	Jerry Hallett	NF	no factor TF: 74-75
2014-09-07	TheJudger	NF-PM1	B1=625000, B2=12812500, E=12
2014-08-31	TheJudger	NF	no factor TF: 73-74
2014-08-31	TheJudger	NF	no factor TF: 72-73
2014-07-21	Architects Cubed	NF	no factor TF: 71-72
2012-08-07	Clown_Royal	NF	no factor TF: 70-71
2012-04-23	Zet_kor	NF	no factor TF: 69-70
2010-01-24	runesk	NF	no factor TF: 68-69
2010-01-23	GrunwalderGIMP	NF	no factor TF: 67-68
2010-01-21	Tyster	NF	no factor TF: 66-67
2010-01-18	HighPriceRanch	NF	no factor TF: 65-66
2010-01-16	egwin	NF	no factor TF: 64-65
2008-10-21	-anonymous-	NF	no factor TF: 1-64
2002-03-10	Joss	NF	no factor TF: 1-57