66 262 411 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 =	585000
B2 =	10968750

Status	Date	User	Residue	Shift	Software
Verified	2015-03-11	Kyle Z Schmidt	5CB20457827003F7	62587793	Windows 64-bit,Prime95,v28.5,build 2
Verified	2023-09-05	Jack Cain	5CB20457827003F7	11940913	Windows 64-bit,Prime95,v30.8,build 17

History

Date	User	Type	Result
2023-09-05	Jack Cain	C-LL	5CB20457827003F7
2021-09-28	Richard Thomas	NF	no factor TF: 74-75
2015-03-11	Kyle Z Schmidt	C-LL	5CB20457827003F7
2014-05-18	1997rj7	NF-PM1	B1=585000, B2=10968750
2014-05-04	TheJudger	NF	no factor TF: 72-73
2014-05-04	TheJudger	NF	no factor TF: 73-74
2014-05-03	Phantomas	NF	no factor TF: 71-72
2012-07-03	CreweNet	NF	no factor TF: 70-71
2012-02-06	Zet_kor	NF	no factor TF: 69-70
2010-05-08	-anonymous-	NF	no factor TF: 68-69
2010-05-02	-anonymous-	NF	no factor TF: 67-68
2010-02-23	Team_Elteor_Borislavj~Bronco	NF	no factor TF: 66-67
2010-02-20	root_slater	NF	no factor TF: 65-66
2009-12-12	Giuseppe Miano	NF	no factor TF: 64-65
2009-05-10	1997rj7	NF	no factor TF: 1-64