is 2 107472557 - 1
has 32352464 decimal digits
takes 440.787 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
-unknown- primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual276142.399164.4737%7590002107600011.09673.9204%153.495865.8665%1.3928%
PrimeNet2728.898462.5000%450000220000009.65865.4108%18.557064.5291%2.0291%
GPU72276142.399164.4737%7000002400000011.71233.9769%154.111465.8865%1.4128%
Difference---+59000-2924000-0.6156-0.0565%-0.6156-0.0201%-0.0201%

Known prime factors (1 factor, 80.8 bits, 0.00007523% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
10747255721757758208161195861994792580.84810122471640905127
72 × 23 × 1787 × 2791 × 1800853		2021-11-23279118008532,489.00.59921.0898

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2021-11-23T22:56:43Jwb52zClay759000210760002580.84811.10881.622.193.920%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2010-04-24T22:57:00sasaki3mate_ma2263264--0.018--
2010-09-08T00:29:00oilwarzonedotcomb2bwebserver264265--0.035--
2012-05-22T04:23:00Richard172.26.180.86265266--0.070--
2013-09-18T13:32:00RobishManual testing266267--0.139--
2013-09-24T08:29:00Fabrice Belletlinux10267268--0.278--
2013-09-28T22:51:00Fabrice Belletlinux10268269--0.556--
2013-10-05T08:37:00Fabrice Belletlinux10269270--1.113--
2013-10-08T20:15:00Fabrice Belletlinux10270271--2.225--
2015-01-19T17:04:00Brandon VincentManual testing271272--4.450--
2020-03-28T11:34:46SRBaseManual testing272273--8.900--
2020-07-09T16:40:14LOBESManual testing273274--17.80--
2021-04-16T20:28:32TheJudgerManual testing274275--35.60--
2021-04-16T20:28:32TheJudgerManual testing275276--71.20--


ECM factoring results:
No ECM results for M107472557


Lucas-Lehmer results:
No L-L results for M107472557


PRP results:
No PRP results for M107472557


P-1 factor-bounds graph:
B1 = 759000, B2 = 21076000 (P-1 stage 2)
B1 = 759000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2021-11-23T23:20:33+00:00