396 953 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
1777274257455779065135257047	28	90.5	2019-04-15 02:49:51

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	351 / 640

Estimated T-Level: 27.7 ⓘ

TF below 2^87 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		David Slowinski	5DB1	0
Verified (Factored)		Klaus Kastens	4D86CB6C01A25DB1	0
Verified (Factored)		Bo Asklund	4D86CB6C01A25DB1	0
Verified (Factored)		Eivind Triel	4D86CB6C01A25DB1	373931
Verified (Factored)	2016-06-01	MadPoo	4D86CB6C01A25DB1	299863

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2019-04-15	matzetoni	2EA0DA22BE26AD4C	1	180442	5	3
Verified	2019-04-15	J.R. Allen	2EA0DA22BE26AD4C	1	45334	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
2019-04-15	J.R. Allen	C-PRP	M396953/1777274257455779065135257047 : 2EA0DA22BE26AD4C PRP: Verified PRP without proof (small exponent)
2019-04-15	matzetoni	C-PRP	M396953/1777274257455779065135257047 : 2EA0DA22BE26AD4C PRP: Verified PRP without proof (small exponent)
2019-04-15	alex	F-ECM	Factor: 1777274257455779065135257047 / (ECM curve 101, B1=250000, B2=25000000, Sigma=6131816095708720)
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	4D86CB6C01A25DB1
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
2012-07-10	alpertron	NF-PM1	B1=10000000, B2=200000000, E=12
2011-11-12	lycorn	NF	no factor from 2^60 to 2^61
2009-01-10	Sturle Sunde	NF	no factor from 2^59 to 2^60
2009-01-05	Sturle Sunde	NF	no factor from 2^58 to 2^59