9 479 Exponent Status

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

PrimeNet Exponent Status

M_n

Details

Composite, with 4 known prime factors. Cofactor is composite.

Trial Factored to 2⁶⁸

TF target 2⁴⁴

Factored

Factor	Digits	Bits	Date
18959	5	14.2	old
48532481	8	25.5	old
9222544536479	13	43.1	old
545689304027818238125528170326653409633	39	128.7	2009-09-27 10:14:59

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	6861 / 16550

Estimated T-Level: 47.1 ⓘ

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
Verified	No proof (small exponent)	2017-09-21	Oliver Kruse	A45CBB4F0B7B3C4D	4	0	1	3
Verified	No proof (small exponent)	2017-10-02	kkmrkkblmbrbk	A45CBB4F0B7B3C4D	4	0	1	3
Verified	No proof (small exponent)	2017-12-07	ATH	A45CBB4F0B7B3C4D	4	72	1	3
Verified	No proof (small exponent)	2020-04-17	Oliver Kruse	78D5C560D54E4CC3	4	6343	5	3
Factored	No proof (small exponent)	2022-05-12	Jorge Coveiro	78D5C560D54E4CC3	1	3520	5	3
Verified	No proof (small exponent)	2024-07-01	kkmrkkblmbrbk	78D5C560D54E4CC3	4	2302	5	3

History

Date	User	Type	Result
2025-04-01	masser	NF-PP1	Start=175/61, B1=1000000000, B2=999000000000
2024-07-01	kkmrkkblmbrbk	C-PRP	M9479/18959/48532481/545689304027818238125528170326653409633/9222544536479 : 78D5C560D54E4CC3
2023-06-29	JacobZ	NF-PM1	B1=61000000000, B2=254995794420917550
2022-11-24	Kevin_9611	NF-PM1	B1=1000000000, B2=100149831201420
2022-05-12	Jorge Coveiro	C-PRP	M9479/18959 : 78D5C560D54E4CC3
2021-12-16	ANONYMOUS	NF-PM1	B1=100000000
2020-04-17	Oliver Kruse	C-PRP	M9479/18959/48532481/9222544536479/545689304027818238125528170326653409633 : 78D5C560D54E4CC3
2017-12-07	ATH	C-PRP	M9479/18959/48532481/9222544536479/545689304027818238125528170326653409633 : A45CBB4F0B7B3C4D
2017-10-02	kkmrkkblmbrbk	C-PRP	M9479/18959/48532481/9222544536479/545689304027818238125528170326653409633 : A45CBB4F0B7B3C4D
2017-09-21	Oliver Kruse	C-PRP	M9479/known_factors : A45CBB4F0B7B3C4D
2009-09-27	Rob_Dee	F-ECM	Factor: 545689304027818238125528170326653409633