2 457 487 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
3840493120499705881	19	61.7	2011-01-20 01:52:46

ECM

Digits	B1	Curves
25	50000	201 / 280

Estimated T-Level: 23.6 ⓘ

TF below 2^73 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Simon Burge	EA5AE1405A52C76F	0
Verified (Factored)	1998-03-23	Chuck Hines	EA5AE1405A52C76F	0

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-13	Oliver Kruse	836E1B9A3F338C03	1	213639	5	3
Verified	2017-11-28	ATH	836E1B9A3F338C03	1	1008607	5	3

History

Date	User	Type	Result
2022-03-10	LordJulius	NF	no factor from 2^1 to 2^60
2018-09-28	alpertron	NF-PM1	B1=2000000, B2=60000000, E=12
2017-11-28	ATH	C-PRP	M2457487/3840493120499705881 : 836E1B9A3F338C03 PRP: Verified PRP without proof (not generated)
2017-10-13	Oliver Kruse	C-PRP	M2457487/3840493120499705881 : 836E1B9A3F338C03 PRP: Verified PRP without proof (not generated)
2011-01-20	Oscar Östlin	F	Factor: 3840493120499705881
2010-12-22	Joss	NF-PM1	B1=20000
2009-01-10	Sturle Sunde	NF	no factor from 2^60 to 2^61