84 781 721 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 =	680000
B2 =	13260000

Status	Date	User	Residue	Shift	Software
Unverified	2019-05-04	patgie	0638197712F726__	8219	CUDALucas v2.06beta

History

Date	User	Type	Result
2019-05-04	patgie	C-LL	0638197712F726__
2019-04-27	ATH	NF	no factor TF: 63-64
2019-04-27	ATH	NF	no factor TF: 1-63
2017-12-05	Oliver Kruse	NF-PM1	B1=680000, B2=13260000, E=12
2017-06-04	TheJudger	NF	no factor TF: 75-76
2017-06-04	TheJudger	NF	no factor TF: 74-75
2017-05-12	-anonymous-	NF	no factor TF: 73-74
2017-02-09	Judge Hale	NF	no factor TF: 71-72
2017-02-09	Judge Hale	NF	no factor TF: 72-73
2014-03-06	]mh[ Virtek	NF	no factor TF: 70-71
2014-01-15	Preben S	NF	no factor TF: 69-70
2013-12-19	MarekB	NF	no factor TF: 68-69
2013-12-13	-anonymous-	NF	no factor TF: 67-68
2013-02-21	Freaks32	NF	no factor TF: 66-67
2012-08-08	Carsten Kossendey	NF	no factor TF: 65-66
2010-12-09	Architects Cubed	NF	no factor TF: 64-65