142 553 Exponent Status

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GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Status

Details

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

Factored

Factor	Digits	Bits	Date
863300969	9	29.7	old
487431392724544298519	21	68.7	2015-05-22 10:20:52
2918347293958143572676377	25	81.3	2018-12-30 17:24:04
794582263875694476032493421687	30	99.3	2019-01-04 10:16:06

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	640 / 640
35	1000000	188 / 1566

Estimated T-Level: 30.6 ⓘ

TF below 2^97 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-09-22	Oliver Kruse	39687C7BE28C7629	2	0	1	3
Verified (Factored)	2017-10-13	kkmrkkblmbrbk	39687C7BE28C7629	2	2569	1	3
Verified (Factored)	2019-01-01	Oliver Kruse	1A9F946446C36498	3	128695	5	3
Verified (Factored)	2019-01-03	arnaud	1A9F946446C36498	3	87513	5	3
Verified	2019-01-04	ATH	1A9F946446C36498	4	78697	5	3

History

Date	User	Type	Result
2019-01-04	ATH	C-PRP	M142553/863300969/487431392724544298519/2918347293958143572676377/794582263875694476032493421687 : 1A9F946446C36498 PRP: Verified PRP without proof (small exponent)
2019-01-04	Niels_Mache_Nextcloud	F-ECM	Factor: 794582263875694476032493421687 / (ECM curve 2, B1=250000, B2=25000000)
2019-01-03	arnaud	C-PRP	M142553/863300969/487431392724544298519/2918347293958143572676377 : 1A9F946446C36498 PRP: Verified PRP without proof (small exponent)
2019-01-01	Oliver Kruse	C-PRP	M142553/863300969/487431392724544298519/2918347293958143572676377 : 1A9F946446C36498 PRP: Verified PRP without proof (small exponent)
2018-12-30	Niels_Mache_Nextcloud	F-ECM	Factor: 2918347293958143572676377 / (ECM curve 1, B1=250000, B2=25000000)
2017-10-13	kkmrkkblmbrbk	C-PRP	M142553/863300969/487431392724544298519 : 39687C7BE28C7629 PRP: Verified PRP without proof (not generated)
2017-09-22	Oliver Kruse	C-PRP	M142553/863300969/487431392724544298519 : 39687C7BE28C7629 PRP: Verified PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M142553/863300969/487431392724544298519 : 39687C7BE28C7629 PRP without proof (not generated)
2017-04-01	kkmrkkblmbrbk	NF-PM1	B1=100000000, B2=2000000000, E=12
2015-05-22	TJAOI	F-ECM	Factor: 487431392724544298519 / (ECM curve 7, B1=50000, B2=5000000)