is 2 2241539 - 1
has 674771 decimal digits
takes 0.147 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L6C91A38E3733F71Ddouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26713.256067.1642%500000150000000.12305.1937%13.379068.8696%1.7054%
PrimeNet2580.017162.0690%100001800000.00182.8730%0.019063.1587%1.0897%
GPU722620.274164.5161%110001900000.00201.6587%0.276165.1047%0.5886%
Difference+5+12.9820+2.6481%+489000+14810000+0.1210+3.5350%+13.1030+3.7649%+3.7649%

Known prime factors (2 factors, 143.5 bits, 0.00640258% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
22415392585109148863012471857.84357663711157
13 × 29 × 109 × 1403249
1999-02-0710914032490.01510.00730.0136
2241539616963703152510050044849992685.67313762055961384344641
67 × 205403820319169323
2022-06-21672054038203191693233,632,6471.067e+91.993e+9

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
22415391594918513535957538890874004425738120649375344143.516
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-04-24T23:24:28alpertronManual testing5000001500000012-
skipped known factor: 258510914886301247
--0.123--5.194%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-02-07T00:00:00ANONYMOUSv4_computers??57.843180.0070.3000.013
1999-06-06T00:00:00ANONYMOUSv4_computers??57.843180.0070.3000.013


ECM factoring results:

Old Calculation Method

Total ECM effort:1.013 GHz-days
Estimated T-Level:0.550
DigitsB1CurvesCompleteFacMiss
201100011 / 1000.11089.534%
255000011 / 2800.03996.141%

New Calculation Method

Total ECM effort:1.013 GHz-days
Estimated T-Level:0.550
DigitsB1CompleteFacMiss
20110000.43764.594%
25500000.04196.001%
302500000.00399.742%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.257
50000618344570.659
50000650000010.096


Lucas-Lehmer results:
No L-L results for M2241539


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-10T15:07:42Oliver KruseGTX-3
258510914886301247
0D9420CCDA0156__no
2017-11-20T20:10:01kkmrkkblmbrbkc4.xlarge
258510914886301247
0D9420CCDA0156__no
2022-06-27T14:46:53mrhlanai
258510914886301247
61696370315251005004484999
991DA7EF132B26E6no
2022-07-25T05:30:39some-studentsGIMPS_IN_SHANGHAI
258510914886301247
61696370315251005004484999
991DA7EF132B26E6no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-07-25T05:30:39+00:00