2 615 527 Exponent Status

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

PrimeNet Exponent Status

M_n

Details

Composite, with 5 known prime factors. Cofactor is composite.

Trial Factored to 2⁶⁸

TF target 2⁶³

Factored

Factor	Digits	Bits	Date
1297301393	10	30.3	old
382766683289	12	38.5	2008-07-14 20:29:08
2765197917049	13	41.3	2008-07-14 20:29:08
511550441122537	15	48.9	2014-04-16 11:27:20
9806253645691871	16	53.1	2014-09-05 11:10:23

ECM

Digits	B1	Curves
25	50000	237 / 280

Estimated T-Level: 24.2 ⓘ

TF below 2^75 is very unlikely to find new factors due to ECM effort.

Status	Proof	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	PRP without proof (not generated)	2017-10-17	Oliver Kruse	39048CDAD4837139	5	870357	5	3
Verified	PRP without proof (not generated)	2017-12-02	storm5510	39048CDAD4837139	5	1422321	5	3

History

Date	User	Type	Result
2021-07-17	ATH	NF-PP1	Start=2/7, B1=1000000, B2=100000000
2019-07-04	alpertron	NF-PM1	B1=2000000, B2=60000000, E=12
2017-12-02	storm5510	C-PRP	M2615527/1297301393/2765197917049/382766683289/511550441122537/9806253645691871 : 39048CDAD4837139
2017-10-17	Oliver Kruse	C-PRP	M2615527/1297301393/2765197917049/382766683289/511550441122537/9806253645691871 : 39048CDAD4837139
2014-09-05	TJAOI	F	Factor: 9806253645691871
2014-04-16	TJAOI	F	Factor: 511550441122537
2008-07-14	George Woltman	F-ECM	Factor: 382766683289
2008-07-14	George Woltman	F-ECM	Factor: 2765197917049