385 141 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
5027619890555420391239938553	28	92.0	2019-04-13 00:56:37

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	484 / 640

Estimated T-Level: 28.8 ⓘ

TF below 2^91 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		David Slowinski	6CA2	0
Verified (Factored)		Steve Costaras	3E49BECCC91D6CA2	0
Verified (Factored)		Eivind Triel	3E49BECCC91D6CA2	290091
Verified (Factored)	2002-11-02	S57483	3E49BECCC91D6CA2	151927

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2019-04-13	trebor	41DDE0BC549C9FEF	1	297698	5	3
Verified	2019-04-13	ATH	41DDE0BC549C9FEF	1	288635	5	3

History

Date	User	Type	Result
2022-03-07	LordJulius	NF	no factor from 2^54 to 2^55
2019-04-13	ATH	C-PRP	M385141/5027619890555420391239938553 : 41DDE0BC549C9FEF PRP: Verified PRP without proof (small exponent)
2019-04-13	trebor	C-PRP	M385141/5027619890555420391239938553 : 41DDE0BC549C9FEF PRP: Verified PRP without proof (small exponent)
2019-04-13	alex	F-ECM	Factor: 5027619890555420391239938553 / (ECM curve 234, B1=250000, B2=25000000, Sigma=3558683013329963)
2018-02-02	BloodERazor	NF	no factor from 2^64 to 2^65
2017-01-10	mikr	NF-PM1	B1=60000000, B2=3000000000, E=12
2015-11-25	Gordon Spence	NF	no factor from 2^63 to 2^64
2015-11-25	Gordon Spence	NF	no factor from 2^62 to 2^63
2015-08-13	NR	NF	no factor from 2^61 to 2^62
2012-07-21	alpertron	NF-PM1	B1=10000000, B2=200000000, E=12
2011-11-19	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