474 899 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
19693408906132706191	20	64.1	2009-08-30 05:41:03

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	200 / 640

Estimated T-Level: 26.6 ⓘ

TF below 2^83 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		David Slowinski	11BF	0
Verified (Factored)		Allan Menezes	AE1FF6457901D1BF	0
Verified (Factored)		Chris Haley	AE1FF6457901D1BF	0
Verified (Factored)		Eivind Triel	AE1FF6457901D1BF	198726

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-26	Oliver Kruse	167AA19ACBC96359	1	0	1	3
Verified	2017-09-27	Oliver Kruse	167AA19ACBC96359	1	0	1	3
Verified	2017-11-09	kkmrkkblmbrbk	167AA19ACBC96359	1	9903	1	3
Unverified (Reliable)	2020-04-18	Oliver Kruse	8880314A5F9C72__	1	7968	5	3

History

Date	User	Type	Result
2022-03-07	LordJulius	NF	no factor from 2^54 to 2^55
2020-04-18	Oliver Kruse	C-PRP	M474899/19693408906132706191 : 8880314A5F9C72__ PRP: Unverified (Reliable) PRP without proof (small exponent)
2017-11-09	kkmrkkblmbrbk	C-PRP	M474899/19693408906132706191 : 167AA19ACBC96359 PRP: Unverified (Reliable) PRP without proof (small exponent)
2017-09-27	Oliver Kruse	C-PRP	M474899/19693408906132706191 : 167AA19ACBC96359 PRP: Unverified (Reliable) PRP without proof (not generated)
2017-09-26	Oliver Kruse	C-PRP	M474899/19693408906132706191 : 167AA19ACBC96359 PRP: Unverified (Reliable) PRP without proof (not generated)
2009-08-30	JimBa	F-ECM	Factor: 19693408906132706191
2009-08-07	James Hintz	NF-PM1	B1=10000000, B2=250000000, E=12