is 2 17052247 - 1
has 5133238 decimal digits
takes 9.710 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LAF6474A1F1DF7B1Fdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual274224.361466.2162%302137730213772.49472.5433%226.856167.0754%0.8592%
PrimeNet2650.427861.5385%8000024000000.17044.5321%0.598363.2816%1.7431%
GPU722697.001263.7681%12000032000000.23763.2967%7.238964.9626%1.1945%
Difference+5+217.3601+2.4481%+2901377-178623+2.2571-0.7534%+219.6172+2.1128%-0.3353%

Known prime factors (1 factor, 128.3 bits, 0.00075242% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1705224742048728169811202242067119677505241328139128.30512329380453441473795819143271120
24 × 3 × 5 × 83 × 239 × 17659 × 20887 × 42641 × 184199 × 893917
2022-03-251841998939171.105e+100.18400.3095

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-11-16T00:00:00ANONYMOUSv4_computers2200005500000---0.419--2.368%
2022-03-25T06:25:26LaurVZero8183021377302137739128.3052.49519.424.9892.543%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-02-11T00:00:00Net_Forcev4_computers21258--0.002--
2001-03-11T00:00:00Net_Forcev4_computers21259--0.005--
2001-08-12T00:00:00ANONYMOUSv4_computers21265--0.428--
2016-03-15T17:29:52Mark RoseManual testing265266--0.438--
2014-09-15T13:05:00NesowaManual testing266267--0.876--
2016-01-21T18:50:40mikrManual testing267268--1.753--
2017-10-24T08:56:20ramgeisManual testing268269--3.506--
2020-01-19T15:33:40masserManual testing269270--7.012--
2021-09-09T16:34:11SRBaseManual testing270271--14.02--
2021-09-17T23:38:05-Anonymous-Manual testing271272--28.05--
2022-01-11T15:19:26ZacHFXManual testing272273--56.09--
2022-01-31T22:34:12Jon PaceManual testing273274--112.2--


ECM factoring results:
Total ECM effort:0.866 GHz-days
Estimated T-Level:0.192
DigitsB1CompleteFacMiss
20110000.03896.227%
25500000.00499.645%


ECM Summary

B1B2factorcurvesGHz-days
50000500000010.866


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2003-02-09T00:00:00ANONYMOUSv4_computersAF6474A1F1DF7B1F9.71
2007-02-05T00:00:00Team Prime Ribv4_computersAF6474A1F1DF7B1F9.71


PRP results:
No PRP results for M17052247


P-1 factor-bounds graph:
B1 = 3021377 (P-1 stage 1)
B1 = 220000, B2 = 5500000 (P-1 stage 2)
B1 = 220000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-03-25T06:25:26+00:00