2 445 253 Exponent Status

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

PrimeNet Exponent Status

M_n

Details

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

Trial Factored to 2⁶⁸

TF target 2⁶³

Factored

Factor	Digits	Bits	Date
431936210135462311	18	58.6	old

ECM

Digits	B1	Curves
25	50000	170 / 280

Estimated T-Level: 23.0 ⓘ

TF below 2^72 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift	Software
Factored		Fumitaka Hayashi	6848323AF0290582	0	Windows,Prime95,v11,(aka WC)

Status	Proof	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	PRP without proof (not generated)	2017-10-13	Oliver Kruse	2BF274638E24BBE0	1	556334	5	3
Verified	PRP without proof (not generated)	2017-11-28	storm5510	2BF274638E24BBE0	1	1636277	5	3

History

Date	User	Type	Result
2018-09-28	alpertron	NF-PM1	B1=2000000, B2=60000000, E=12
2017-11-28	storm5510	C-PRP	M2445253/431936210135462311 : 2BF274638E24BBE0
2017-10-13	Oliver Kruse	C-PRP	M2445253/431936210135462311 : 2BF274638E24BBE0
1999-03-15	-anonymous-	F	Factor: 431936210135462311

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