389 749 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
35157083141838820140048845608443589051481	41	134.7	2019-04-14 07:19:47

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	397 / 640

Estimated T-Level: 28.1 ⓘ

TF below 2^88 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		David Slowinski	2D4	0
Verified (Factored)		tom ehlert	312384A1CED482D4	0
Verified (Factored)		Eivind Triel	312384A1CED482D4	13280
Verified (Factored)	2002-11-09	S57483	312384A1CED482D4	287469

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2019-04-14	bunddog	F45684618911A1E5	1	130648	5	3
Verified	2019-04-15	marssystems	F45684618911A1E5	1	151584	5	3

History

Date	User	Type	Result
2022-03-07	LordJulius	NF	no factor from 2^54 to 2^55
2019-04-15	marssystems	C-PRP	M389749/35157083141838820140048845608443589051481 : F45684618911A1E5 PRP: Verified PRP without proof (small exponent)
2019-04-14	bunddog	C-PRP	M389749/35157083141838820140048845608443589051481 : F45684618911A1E5 PRP: Verified PRP without proof (small exponent)
2019-04-14	alex	F-ECM	Factor: 35157083141838820140048845608443589051481 / (ECM curve 147, B1=250000, B2=25000000, Sigma=7835381084152872)
2018-01-31	BloodERazor	NF	no factor from 2^64 to 2^65
2017-01-16	mikr	NF-PM1	B1=60000000, B2=3000000000, E=12
2015-11-28	Gordon Spence	NF	no factor from 2^63 to 2^64
2015-11-28	Gordon Spence	NF	no factor from 2^62 to 2^63
2012-12-01	dbaugh	NF	no factor from 2^61 to 2^62
2012-11-27	dbaugh	NF	no factor from 2^60 to 2^61
2012-08-01	alpertron	NF-PM1	B1=10000000, B2=200000000, E=12
2009-01-07	Sturle Sunde	NF	no factor from 2^59 to 2^60
2008-12-29	Sturle Sunde	NF	no factor from 2^58 to 2^59