2 846 791 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 1 known prime factor. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
618925780957426303483279	24	79.0	2020-03-15 14:44:30

ECM

Digits	B1	Curves
25	50000	96 / 280

Estimated T-Level: 21.7 ⓘ

TF below 2^67 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Randy d. Miller	ECC45439B503FCD3	0
Verified (Factored)	1999-09-30	Bruce Mitchell	ECC45439B503FCD3	2795689
Verified (Factored)	2018-09-15	kkmrkkblmbrbk	ECC45439B503FCD3	1152470

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2020-03-15	mrh	7F03016EFA9A504F	1	1307950	5	3
Verified	2020-03-15	ATH	7F03016EFA9A504F	1	2153451	5	3

P-1 factors

Date	Factor	B1	B2
2020-03-15	618925780957426303483279	5000000	200000000

History

Date	User	Type	Result
2020-03-15	ATH	C-PRP	M2846791/618925780957426303483279 : 7F03016EFA9A504F PRP: Verified PRP without proof (not generated)
2020-03-15	mrh	C-PRP	M2846791/618925780957426303483279 : 7F03016EFA9A504F PRP: Verified PRP without proof (not generated)
2020-03-15	masser	F-PM1	Factor: 618925780957426303483279 / (P-1, B1=5000000, B2=200000000, E=12)
2019-11-01	masser	NF-PM1	B1=2850000, B2=28500000, E=12
2019-01-07	chuenkit	NF	no factor from 2^67 to 2^68
2018-09-15	kkmrkkblmbrbk	C-LL	ECC45439B503FCD3
2017-11-05	Gordon Spence	NF	no factor from 2^66 to 2^67
2017-06-28	Joss	NF-PM1	B1=390000, B2=3900000, E=6
2016-02-23	Mark Rose	NF	no factor from 2^1 to 2^60
2016-02-14	ramgeis	NF	no factor from 2^65 to 2^66
2015-04-21	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-04-21	VictordeHollander	NF	no factor from 2^63 to 2^64
2013-01-10	dbaugh	NF	no factor from 2^62 to 2^63
2012-02-05	markr	NF	no factor from 2^61 to 2^62
2012-01-14	Squeeky_Squirrel	NF-PM1	B1=195000, B2=4875000, E=6
2011-01-25	Joss	NF-PM1	B1=50000
2009-02-12	Sturle Sunde	NF	no factor from 2^60 to 2^61
2008-10-31	Jayson King	NF-PM1	B1=35000, B2=560000