81 536 717 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Details

Tested as composite (unverified): unconfirmed Lucas-Lehmer test says not-prime

No factors below 2⁷⁶

TF target 2⁷⁵

P-1

B1 =	715000
B2 =	13942500

Status	Date	User	Residue	Shift	Software
Unverified	2017-09-14	curtisc	7A52BBC87234D4__	36844434	Windows Service,Prime95,v28.7,build 1

History

Date	User	Type	Result
2025-09-19	Sid & Andy	NF	no factor TF: 75-76
2017-09-14	curtisc	C-LL	7A52BBC87234D4__
2016-09-25	TheJudger	NF-PM1	B1=715000, B2=13942500
2016-09-02	AirSquirrels	NF	no factor TF: 74-75
2016-09-02	AirSquirrels	NF	no factor TF: 73-74
2016-09-02	AirSquirrels	NF	no factor TF: 72-73
2016-09-02	AirSquirrels	NF	no factor TF: 71-72
2013-07-12	roemer2201	NF	no factor TF: 70-71
2013-02-07	SWL551	NF	no factor TF: 69-70
2013-02-07	SWL551	NF	no factor TF: 68-69
2013-02-04	ITS	NF	no factor TF: 67-68
2013-01-30	phoenicis	NF	no factor TF: 66-67
2011-03-08	Milldang	NF	no factor TF: 65-66
2010-12-07	Architects Cubed	NF	no factor TF: 64-65