is 2 5212787 - 1
has 1569206 decimal digits
takes 0.823 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
Actual2675.700265.6716%25000002400000003.535410.2193%9.235669.1797%3.5081%
PrimeNet2620.117962.9032%220005000000.01103.0040%0.128964.0176%1.1144%
GPU722662.833165.1515%300006000000.01401.9880%2.847165.8443%0.6928%
Difference+1+2.8671+0.5201%+2470000+239400000+3.5214+8.2312%+6.3885+3.3354%+3.3354%

Known prime factors (3 factors, 169.8 bits, 0.00325758% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
521278736371178735111341.726348865
5 × 11 × 6343
-1163438.497e-88.151e-50.0001
5212787467940606121049991755.3774488391777
227 × 2017 × 9803
2015-01-21201798030.00130.00060.0009
521278777127275007386277937212272.708739789243329780
22 × 32 × 5 × 7 × 4177 × 4889 × 28751
2021-09-27488928751233.500.00140.0023

4 Composite Factors:
exponentprime factorscomposite factordigitsbits*
52127871701955142264441769883327814893097.103
52127872805209904645628760291464507802443135114.434
521278736090983815421245242393836219696491127939128.085
521278713126716230766483682470709533855611282493592592305
69
52169.811
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2021-09-27T12:03:44happy5214Manual testing250000025000002272.7080.5721.6461.1454.118%
2021-10-23T08:27:54happy5214Manual testing2500000240000000-
skipped known factor: 3637117873511
skipped known factor: 46794060612104999
skipped known factor: 7712727500738627793721
--3.535--10.219%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2021-09-27T12:03:44happy5214Manual testing1250000125000027P-12272.7080.435
2021-10-23T08:27:54happy5214Manual testing12500008500000027--1.459


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2015-01-21T12:40:00TJAOIManual testing255256*55.377170.0001.7870.001


ECM factoring results:
No ECM results for M5212787


Lucas-Lehmer results:
No L-L results for M5212787


PRP results:
dateuseridcompidcofactorsres64PRP
2017-11-23T08:51:08kkmrkkblmbrbkc4.xlarge
3637117873511
46794060612104999
8729ED7A116886__no
2018-05-27T09:48:11BattlemaxxWork
3637117873511
46794060612104999
8729ED7A116886__no
2021-09-27T12:51:27happy5214Manual testing
3637117873511
46794060612104999
7712727500738627793721
8729ED7A1168867Fno


P-1 factor-bounds graph:
B1 = 2500000, B2 = 240000000 (P-1 stage 2)
B1 = 2500000 (P-1 stage 1)
B1 = 1250000 (P-1 stage 1)
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TF factor-bounds graph:
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2100
Last modified: 2021-10-23T08:27:54+00:00