is 2 2610889 - 1
has 785956 decimal digits
takes 0.181 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L59EF93AE99CB2C64double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26711.380867.1642 %2000000600000000.51907.6812 %11.899769.6864 %
Target2630.611365.0794 %1200010000000.00661.5316 %0.617965.6142 %
Difference+4+10.7695+2.0848 %+1988000+59000000+0.5123+6.1496%+11.2818+4.0722 %

Known prime factors (1 factor, 65.4 bits, 0.00250631% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
2610889499423360713884393512065.4379564239627075
52 × 7 × 23 × 2376208603
2009-03-022523762086034.117013.02124.319

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2003-10-31ANONYMOUSv4_computers2048204800--0.0010.669%
2003-11-08Team Prime Ribv4_computers15000217500--0.0031.678%
2019-07-04alpertronManual testing20000006000000012---10.607%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-04-02ANONYMOUSv4_computers212590.015
2022-03-11LordJuliusManual testing21260
2009-01-29Sturle Sundeklengel.ifi2602610.059


ECM factoring results:
Total ECM effort:0.198 GHz-days
DigitsB1CompleteFacMiss


ECM Summary

B1B2factorcurvesGHz-days
10.198


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-05-02ANONYMOUSv4_computers59EF93AE99CB2C640.181


PRP results:
dateuseridcompidcofactorsres64
2017-10-15Oliver KruseGTX-3
49942336071388439351
87885191F7E0B499
2017-12-02kkmrkkblmbrbkc4.xlarge
49942336071388439351
87885191F7E0B499


CERT results:
No CERT results for M2610889


P-1 factor-bounds graph:
B1 = 2000000, B2 = 60000000 (P-1 stage 2)
B1 = 2000000 (P-1 stage 1)
B1 = 15000, B2 = 217500 (P-1 stage 2)
B1 = 15000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 2048 (P-1 stage 1)
100
101
102
103
104
105
106
107
100
101
102
103
104
105
106
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109
1010
TF factor-bounds graph:
261
260
259
this exponent TF target: 63
TF double-checked to: 67
250
260
270
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Last modified: 2024-03-13T02:15:48+00:00