2 605 237 Exponent Status

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

PrimeNet Exponent Status

M_n

Details

Composite, with 2 known prime factors. Cofactor is composite.

Trial Factored to 2⁶⁸

TF target 2⁶³

Factored

Factor	Digits	Bits	Date
1245303287	10	30.2	old
33451243081	11	35.0	2008-07-14 20:25:20

ECM

Digits	B1	Curves
25	50000	272 / 280

Estimated T-Level: 24.9 ⓘ

TF below 2^78 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)	2017-10-15	Oliver Kruse	A0D6E898A4216553	2	1917550	5	3
Verified	PRP without proof (not generated)	2017-12-02	storm5510	A0D6E898A4216553	2	2494015	5	3

History

Date	User	Type	Result
2019-07-04	alpertron	NF-PM1	B1=2000000, B2=60000000, E=12
2017-12-02	storm5510	C-PRP	M2605237/1245303287/33451243081 : A0D6E898A4216553
2017-10-15	Oliver Kruse	C-PRP	M2605237/1245303287/33451243081 : A0D6E898A4216553
2008-07-14	George Woltman	F-ECM	Factor: 33451243081

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