3 028 217 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
118270037988152747119879	24	76.6	2020-02-29 14:39:02

ECM

Digits	B1	Curves
25	50000	15 / 280

Estimated T-Level: 20.3 ⓘ

TF below 2^62 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Horng-Ming Chen	2CC9B5EF86166F9A	0
Verified (Factored)	1999-06-15	Calum Adams	2CC9B5EF86166F9A	801694

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2020-03-01	Christoph Zenger	1103E7D833BD8492	1	349877	5	3
Verified	2020-03-06	roemer2201	1103E7D833BD8492	1	1555228	5	3

P-1 factors

Date	Factor	B1	B2
2020-02-29	118270037988152747119879	32648822	1860982854

History

Date	User	Type	Result
2022-09-07	Joss	NF-PM1	B1=1052820, B2=226749600
2022-01-23	Joss	NF-PM1	B1=1052820, B2=119912100
2021-01-14	Joss	NF-PM1	B1=302821, B2=3028217, E=6
2021-01-14	Joss	NF-PM1	B1=302821
2020-03-06	roemer2201	C-PRP	M3028217/118270037988152747119879 : 1103E7D833BD8492 PRP: Verified PRP without proof (not generated)
2020-03-01	Christoph Zenger	C-PRP	M3028217/118270037988152747119879 : 1103E7D833BD8492 PRP: Verified PRP without proof (not generated)
2020-02-29	oodaira	F-PM1	Factor: 118270037988152747119879 / (P-1, B1=32648822, B2=1860982854, E=12)
2018-07-16	ramgeis	NF	no factor from 2^67 to 2^68
2017-06-13	mikr	NF-PM1	B1=3000000, B2=100000000, E=12
2017-05-02	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-04-27	USAFSS	NF-PM1	B1=205000, B2=5637500, E=12
2015-06-02	Tha	NF	no factor from 2^65 to 2^66
2015-02-07	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-02-07	VictordeHollander	NF	no factor from 2^63 to 2^64
2013-01-07	dbaugh	NF	no factor from 2^62 to 2^63
2010-10-12	markr	NF-PM1	B1=115000, B2=2357500, E=6
2010-10-09	Sid & Andy	NF	no factor from 2^61 to 2^62
2009-01-30	Jayson King	NF	no factor from 2^60 to 2^61