3 151 741 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
18910447	8	24.2	old

ECM

Digits	B1	Curves
25	50000	20 / 280

Estimated T-Level: 20.4 ⓘ

TF below 2^63 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-31	Oliver Kruse	AE86A5EC746B8ADE	1	450940	5	3
Verified	2017-12-12	kkmrkkblmbrbk	AE86A5EC746B8ADE	1	2656661	5	3

History

Date	User	Type	Result
2022-03-25	LordJulius	NF	no factor from 2^66 to 2^67
2022-01-14	Joss	NF-PM1	B1=1000000, B2=119912100
2021-03-27	Joss	NF	no factor from 2^67 to 2^68
2021-01-18	Joss	NF	no factor from 2^65 to 2^66
2021-01-02	Joss	NF	no factor from 2^64 to 2^65
2020-10-04	Joss	NF-PM1	B1=315174, B2=3151741, E=6
2020-08-30	Joss	NF-PM1	B1=315174
2017-12-12	kkmrkkblmbrbk	C-PRP	M3151741/18910447 : AE86A5EC746B8ADE PRP: Verified PRP without proof (not generated)
2017-10-31	Oliver Kruse	C-PRP	M3151741/18910447 : AE86A5EC746B8ADE PRP: Verified PRP without proof (not generated)