is 2 1836277 - 1
has 552775 decimal digits
takes 0.100 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LD115D8BB817A3E74double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26832.459669.1176 %18362771836277000.92368.0183 %33.383271.5939 %
Target2610.167365.5738 %90007000000.00371.5957 %0.171066.1231 %
Difference+7+32.2923+3.5439 %+1827277+182927700+0.9199+6.4226%+33.2122+5.4708 %

Known prime factors (1 factor, 93.2 bits, 0.00507766% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1836277116958991164419087574614248872993.2403184677234546288157359
32 × 887 × 398932385637766273
2019-12-198873989323856377662731.092e+91.710e+93.193e+9

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2011-02-07Carsten Kossendeymother10000016750006--0.0154.947%
2014-05-19JossManual testing134953134953--0.0112.341%
2014-09-22JossManual testing169906169906--0.0132.590%
2015-06-30mikrMSI27800009176000012--0.60012.884%
2018-08-13JossManual testing183627718362770012--0.92413.758%


Trial Factoring results:
575859606162636465666768
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2003-01-16ANONYMOUSv4_computers212580.021
2016-02-23Mark RoseManual testing2582600.063
2010-04-15Architects Cubeda3_lm2602610.084
2016-02-23Mark RoseManual testing2612620.167
2011-01-21GrunwalderGIMPManual testing212630.869
2016-02-23Mark RoseManual testing2622630.535
2015-04-26snme2pm1Manual testing2632641.069
2015-04-26snme2pm1Manual testing2642652.035
2015-09-05ramgeisManual testing2652664.070
2018-01-29TJAOIManual testing2662678.139
2019-06-24TJAOIManual testing26726816.28


ECM factoring results:
Total ECM effort:39.340 GHz-days
Estimated T-Level:25.717
DigitsB1CompleteFacMiss
201100015.0210.000%
25500001.69218.424%
302500000.14386.636%
3510000000.01099.017%


ECM Summary

B1B2factorcurvesGHz-days
500005000000724.870
50000500000020.138
50000660000017713.79
250000400000004820.54


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-01-29ANONYMOUSv4_computersD115D8BB817A3E740.100
2001-11-24ANONYMOUSv4_computersD115D8BB817A3E740.100
2002-08-31ANONYMOUSv4_computersD115D8BB817A3E740.100
2015-07-16MadPooManual testingD115D8BB817A3E740.100


PRP results:
dateuseridcompidcofactorsres64
2019-12-20Niels_Mache_NextcloudSuperDry-X
11695899116441908757461424887
F5D2136A2897AA5B
2019-12-21daveward2005Davy
11695899116441908757461424887
F5D2136A2897AA5B


CERT results:
No CERT results for M1836277


P-1 factor-bounds graph:
B1 = 1836277, B2 = 183627700 (P-1 stage 2)
B1 = 2780000, B2 = 91760000 (P-1 stage 2)
B1 = 2780000 (P-1 stage 1)
B1 = 1836277 (P-1 stage 1)
B1 = 100000, B2 = 1675000 (P-1 stage 2)
B1 = 169906 (P-1 stage 1)
B1 = 134953 (P-1 stage 1)
B1 = 100000 (P-1 stage 1)
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TF factor-bounds graph:
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this exponent TF target: 61
TF double-checked to: 67
ECM T-Level=25.72 ~= 69-bit
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Last modified: 2024-02-29T14:28:04+00:00