is 2 61650577 - 1
has 18558673 decimal digits
takes 144.822 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L9D8533C839B09A3Adouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual275124.117465.3333 %780000159900005.47943.8332 %129.596866.6622 %
Target27462.057364.8649 %4000006500000013.35073.7191 %75.408066.1716 %
Difference+1+62.0601+0.4685 %+380000-49010000-7.8713+0.1141%+54.1888+0.4906 %

Known prime factors (1 factor, 91.2 bits, 0.00014791% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
6165057728216335357352914509760288712891.18922884080515055775155
5 × 7 × 29 × 53 × 167 × 431 × 3539 × 1670003
2019-07-243539167000310,414,4270.32130.5788

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2013-02-19TONYtwincept695000695000--2.3671.722%
2019-07-24Architects Cubedgpu7278000015990000622891.1895.4804.217%


Trial Factoring results:
57585960616263646566676869707172737475
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2003-06-17Gordon Spencev4_computers212590.001
2003-11-16Gordon Spencev4_computers212600.001
2004-04-09ANONYMOUSv4_computers212620.005
2016-02-23Mark RoseManual testing2622630.016
2009-02-04Sturle Sundekinner.ifi2632640.032
2009-04-25garyfuhome_office2642650.061
2009-07-22unconnectedtest53452652660.121
2009-07-24Sturle Sundegaudi.ifi2662680.727
2009-07-28Sturle Sundeenstrom.ifi2682690.970
2011-11-20eon_blue_apocalypse4core-numcrunch2692701.939
2012-09-03Paul Vuichoud10242702713.879
2013-02-04delta_tManual testing27127323.27
2016-03-04ANONYMOUSManual testing27327431.03
2019-05-25Sid & AndyManual testing27427562.06


ECM factoring results:
No ECM results for M61650577


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2013-05-11TONYtwincept9D8533C839B09A3A144.8


PRP results:
No PRP results for M61650577


CERT results:
No CERT results for M61650577


P-1 factor-bounds graph:
B1 = 780000, B2 = 15990000 (P-1 stage 2)
B1 = 780000 (P-1 stage 1)
B1 = 695000 (P-1 stage 1)
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108
TF factor-bounds graph:
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273
271
270
269
268
266
265
264
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262
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259
this exponent TF target: 74
TF double-checked to: 67
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Last modified: 2024-03-13T02:15:48+00:00