is 2 61270289 - 1
has 18444195 decimal digits
takes 143.928 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual27331.219864.3836 %----31.219864.3836 %
Target27462.442464.8649 %4000006500000013.35073.7162 %75.793266.1705 %
Difference-1-31.2227-0.4813 %-400000-65000000-13.3507-3.7162 %-44.5734-1.7870 %

Known prime factors (1 factor, 83.8 bits, 0.00013670% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
61270289163669926226744448816096412683.759133563860149855380
22 × 3 × 5 × 7 × 373 × 305497 × 2790769
2013-02-07305497279076952,3181.50182.1177

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2013-02-07TylerWork2683.7593.9670.000%


Trial Factoring results:
575859606162636465666768697071727374
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2003-06-17Gordon Spencev4_computers212590.001
2003-10-23Gordon Spencev4_computers212600.001
2004-04-09ANONYMOUSv4_computers212620.005
2022-03-29LordJuliusManual testing262263
2009-01-31Sturle Sundegolli.ifi2632640.032
2009-04-02Michael BammannSupercomputer_II2642650.061
2009-04-06searchingforprimesHarwich62652660.122
2009-04-07CPSlackerbf-st-2k3-64-2p2662670.244
2009-05-11ANONYMOUS2672680.488
2009-07-14MillsieHome2682690.976
2012-03-22S00030vd012692701.951
2012-08-27SWL551Manual testing2702713.903
2013-01-25GrunwalderGIMPManual testing27127323.42


ECM factoring results:
No ECM results for M61270289


Lucas-Lehmer results:
No L-L results for M61270289


PRP results:
No PRP results for M61270289


CERT results:
No CERT results for M61270289


P-1 factor-bounds graph:
104
105
106
104
105
106
107
TF factor-bounds graph:
273
271
270
269
268
267
266
265
264
263
262
260
259
this exponent TF target: 74
TF double-checked to: 67
250
260
270
280
290
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Last modified: 2024-03-13T02:15:48+00:00