13 477 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
398411893962314399953	21	68.4	old

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	640 / 640
35	1000000	1566 / 1566
40	3000000	4588 / 4588
45	11000000	1334 / 9201

Estimated T-Level: 40.7 ⓘ

TF below 2^130 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-21	Oliver Kruse	CFDFE9C43EDF5E3A	1	0	1	3
Verified	2017-10-12	kkmrkkblmbrbk	CFDFE9C43EDF5E3A	1	3066	1	3
Unverified	2020-04-17	Oliver Kruse	77568D181C9CF2__	1	10163	5	3

P-1 factors

Date	Factor	B1	B2
2024-01-29	398411893962314399953	100000000000	122154521813133808

History

Date	User	Type	Result
2024-01-29	-Anonymous-	F-PM1	Factor: 398411893962314399953 / (P-1, B1=100000000000, B2=122154521813133810)
2023-05-19	JacobZ	NF-PM1	B1=8200000000, B2=35024272926292650
2022-02-05	Joss	NF-PM1	B1=1000000, B2=2389799412000
2020-04-17	Oliver Kruse	C-PRP	M13477/398411893962314399953 : 77568D181C9CF2__ PRP without proof (small exponent)
2017-10-12	kkmrkkblmbrbk	C-PRP	M13477/398411893962314399953 : CFDFE9C43EDF5E3A PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M13477/398411893962314399953 : CFDFE9C43EDF5E3A PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M13477/398411893962314399953 : CFDFE9C43EDF5E3A PRP without proof (not generated)