397 297 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
62325881923853703483324641839	29	95.7	2019-04-18 07:28:13

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	267 / 640

Estimated T-Level: 27.1 ⓘ

TF below 2^85 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		David Slowinski	4A73	0
Verified (Factored)		Klaus Kastens	5E206713EC37CA73	0
Verified (Factored)		Kevin N. Carpenter	5E206713EC37CA73	0
Verified (Factored)		Eivind Triel	5E206713EC37CA73	205437
Verified (Factored)	2016-06-01	MadPoo	5E206713EC37CA73	68623

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2019-04-19	trebor	C14C55A4C59EF02A	1	80023	5	3
Verified	2019-04-19	matzetoni	C14C55A4C59EF02A	1	264327	5	3
Verified	2019-04-21	arnaud	C14C55A4C59EF02A	1	295355	5	3

History

Date	User	Type	Result
2022-03-07	LordJulius	NF	no factor from 2^54 to 2^55
2019-05-02	Gordon Spence	NF	no factor from 2^65 to 2^66
2019-04-21	arnaud	C-PRP	M397297/62325881923853703483324641839 : C14C55A4C59EF02A PRP: Verified PRP without proof (small exponent)
2019-04-19	matzetoni	C-PRP	M397297/62325881923853703483324641839 : C14C55A4C59EF02A PRP: Verified PRP without proof (small exponent)
2019-04-19	trebor	C-PRP	M397297/62325881923853703483324641839 : C14C55A4C59EF02A PRP: Verified PRP without proof (small exponent)
2019-04-18	alex	F-ECM	Factor: 62325881923853703483324641839 / (ECM curve 17, B1=250000, B2=25000000, Sigma=2279320682594814)
2018-01-18	BloodERazor	NF	no factor from 2^64 to 2^65
2017-01-26	mikr	NF-PM1	B1=60000000, B2=3000000000, E=12
2016-06-01	MadPoo	C-LL	5E206713EC37CA73
2015-11-19	Gordon Spence	NF	no factor from 2^63 to 2^64
2015-11-19	Gordon Spence	NF	no factor from 2^62 to 2^63
2015-08-13	NR	NF	no factor from 2^61 to 2^62
2012-07-12	alpertron	NF-PM1	B1=10000000, B2=200000000, E=12
2011-11-13	lycorn	NF	no factor from 2^60 to 2^61
2009-01-11	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