371 513 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
192665886888685486055595847	27	87.3	2019-04-08 02:47:37

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	292 / 640

Estimated T-Level: 27.3 ⓘ

TF below 2^86 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		David Slowinski	1E55	0
Verified (Factored)		Jim Kraemer	5FDFD12E55FD9E55	0
Verified (Factored)		Eivind Triel	5FDFD12E55FD9E55	14488
Verified (Factored)	2002-01-02	Dennis Pope	5FDFD12E55FD9E55	125401

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2019-04-08	artorollo	2114306C02B27FF0	1	123815	5	3
Verified	2019-04-09	marssystems	2114306C02B27FF0	1	136710	5	3

History

Date	User	Type	Result
2022-03-07	LordJulius	NF	no factor from 2^54 to 2^55
2019-04-09	marssystems	C-PRP	M371513/192665886888685486055595847 : 2114306C02B27FF0 PRP: Verified PRP without proof (small exponent)
2019-04-08	artorollo	C-PRP	M371513/192665886888685486055595847 : 2114306C02B27FF0 PRP: Verified PRP without proof (small exponent)
2019-04-08	alex	F-ECM	Factor: 192665886888685486055595847 / (ECM curve 42, B1=250000, B2=25000000, Sigma=2923269405115445)
2018-02-22	Gordon Spence	NF	no factor from 2^64 to 2^65
2018-02-09	BloodERazor	NF	no factor from 2^64 to 2^65
2017-02-09	mikr	NF-PM1	B1=60000000, B2=3000000000, E=12
2015-11-21	Gordon Spence	NF	no factor from 2^63 to 2^64
2015-11-21	Gordon Spence	NF	no factor from 2^62 to 2^63
2015-08-13	NR	NF	no factor from 2^61 to 2^62
2013-01-14	Sid & Andy	NF	no factor from 2^60 to 2^61
2012-08-05	alpertron	NF-PM1	B1=10000000, B2=200000000, E=12
2012-05-29	Joss	NF-PM1	B1=3598511
2012-03-05	Joss	NF-PM1	B1=1499379
2011-08-20	Joss	NF-PM1	B1=1199503
2009-01-24	Sturle Sunde	NF	no factor from 2^59 to 2^60
2009-01-06	Sturle Sunde	NF	no factor from 2^58 to 2^59