1 248 241 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
30732095641367625571793	23	74.7	2018-10-05 13:08:20
120089455779008969959790436223	30	96.6	2015-01-17 16:24:28

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	100 / 640

Estimated T-Level: 25.8 ⓘ

TF below 2^81 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Lloyd Miller	8D261500A322685D	0
Verified (Factored)		Cornelius Caesar	8D261500A322685D	0
Verified (Factored)		Ricardo Montiel	8D261500A322685D	0

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-09-29	Oliver Kruse	1438AE9C2EC1A613	1	0	1	3
Verified (Factored)	2017-10-20	kkmrkkblmbrbk	1438AE9C2EC1A613	1	946105	1	3
Verified	2018-10-07	Oliver Kruse	098E076BE9D5750C	2	437640	5	3
Verified	2018-10-07	ATH	098E076BE9D5750C	2	350089	5	3

P-1 factors

Date	Factor	B1	B2
2015-01-17	120089455779008969959790436223	4218475	156083565

History

Date	User	Type	Result
2022-03-07	LordJulius	NF	no factor from 2^58 to 2^60
2018-10-07	ATH	C-PRP	M1248241/120089455779008969959790436223/30732095641367625571793 : 098E076BE9D5750C PRP: Verified PRP without proof (not generated)
2018-10-07	Oliver Kruse	C-PRP	M1248241/120089455779008969959790436223/30732095641367625571793 : 098E076BE9D5750C PRP: Verified PRP without proof (not generated)
2018-10-05	TJAOI	F-ECM	Factor: 30732095641367625571793 / (ECM curve 128, B1=50000, B2=5000000)
2017-10-20	kkmrkkblmbrbk	C-PRP	M1248241/120089455779008969959790436223 : 1438AE9C2EC1A613 PRP: Verified PRP without proof (not generated)
2017-09-29	Oliver Kruse	C-PRP	M1248241/120089455779008969959790436223 : 1438AE9C2EC1A613 PRP: Verified PRP without proof (not generated)
2015-01-17	mikr	F-PM1	Factor: 120089455779008969959790436223 / (P-1, B1=4218475, B2=156083565, E=12)
2014-09-25	Joss	NF-PM1	B1=251419
2012-10-07	dbaugh	NF	no factor from 2^62 to 2^63
2012-09-14	Axelsson	NF	no factor from 2^61 to 2^62
2009-02-17	Sturle Sunde	NF	no factor from 2^60 to 2^61