66 670 687 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 2⁷⁴

P-1

B1 =	600000
B2 =	12150000

Status	Date	User	Residue	Shift	Software
Verified	2015-05-03	Kyle Z Schmidt	2027BEEA46F53A10	23987067	Windows 64-bit,Prime95,v28.5,build 2
Verified	2023-10-09	RLH	2027BEEA46F53A10	17710848	Windows 64-bit,Prime95,v29.3,build 1

History

Date	User	Type	Result
2023-10-09	RLH	C-LL	2027BEEA46F53A10
2015-05-03	Kyle Z Schmidt	C-LL	2027BEEA46F53A10
2015-03-29	1997rj7	NF	no factor TF: 74-75
2014-03-23	TheJudger	NF-PM1	B1=600000, B2=12150000, E=12
2014-03-17	axn	NF	no factor TF: 73-74
2014-03-17	axn	NF	no factor TF: 72-73
2014-03-17	axn	NF	no factor TF: 71-72
2013-05-17	Matthaeus	NF	no factor TF: 70-71
2012-02-14	Nick	NF	no factor TF: 69-70
2010-05-11	leb	NF	no factor TF: 68-69
2010-05-05	leb	NF	no factor TF: 67-68
2010-04-29	Michael Hanscho	NF	no factor TF: 66-67
2010-04-21	jomateix	NF	no factor TF: 65-66
2010-04-15	Charles Spalton	NF	no factor TF: 64-65
2009-02-23	1997rj7	NF	no factor TF: 1-64