9 887 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 2⁴⁴

Factored

Factor	Digits	Bits	Date
235021365703	12	37.8	old
3292790763908671566589016994908629550236380929	46	151.2	2024-07-06 22:23:33

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	640 / 640
35	1000000	1566 / 1566
40	3000000	4588 / 4588
45	11000000	9201 / 9201
50	44000000	6736 / 16550

Estimated T-Level: 47.0 ⓘ

TF below 2^151 is very unlikely to find new factors due to ECM effort.

Status	Proof	Date	User	Residue	Number of known factors	Shift	Type	Base
Factored	No proof (small exponent)	2017-09-21	Oliver Kruse	577117377742A1AF	1	0	1	3
Factored	No proof (small exponent)	2017-10-12	kkmrkkblmbrbk	577117377742A1AF	1	8999	1	3
Factored	No proof (small exponent)	2020-04-17	Oliver Kruse	41A2AFB27EF19E95	1	655	5	3
Factored	No proof (small exponent)	2024-07-01	kkmrkkblmbrbk	41A2AFB27EF19E95	1	6504	5	3
Verified	No proof (small exponent)	2024-07-06	nordi	41A2AFB27EF19E95	2	6817	5	3

History

Date	User	Type	Result
2025-03-19	masser	NF-PP1	Start=168/17, B1=1000000000, B2=999000000000
2024-07-06	nordi	C-PRP	M9887/235021365703/3292790763908671566589016994908629550236380929 : 41A2AFB27EF19E95
2024-07-06	nordi	F-ECM	Factor: 3292790763908671566589016994908629550236380929 / ECM curve 62, B1=44000000, B2=1117403522235, Edwards Sigma=7318492293070928
2024-07-01	kkmrkkblmbrbk	C-PRP	M9887/235021365703 : 41A2AFB27EF19E95
2023-06-12	JacobZ	NF-PM1	B1=58000000000, B2=241250667952694400
2022-11-24	Kevin_9611	NF-PM1	B1=1000000000, B2=100294988083290
2022-02-05	Joss	NF-PM1	B1=1000000, B2=6010952007060
2020-04-17	Oliver Kruse	C-PRP	M9887/235021365703 : 41A2AFB27EF19E95
2017-10-12	kkmrkkblmbrbk	C-PRP	M9887/235021365703 : 577117377742A1AF
2017-09-21	Oliver Kruse	C-PRP	M9887/235021365703 : 577117377742A1AF
2017-09-21	Oliver Kruse	C-PRP	M9887/235021365703 : 577117377742A1AF