is 2 50877271 - 1
has 15315585 decimal digits
takes 93.204 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
Actual2681.171561.7647 %----1.171561.7647 %
Target27337.597264.3836 %340000550000008.81373.7945 %46.411065.7350 %
Difference-5-36.4257-2.6189 %-340000-55000000-8.8137-3.7945 %-45.2394-3.9703 %

Known prime factors (1 factor, 73.6 bits, 0.00014473% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
50877271146535659640537458858392373.634144008961919889
11 × 4919 × 5693 × 467497
2009-04-28569346749750.0410.08200.1264

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2009-04-28Sturle Sundenikabrik.ifi2373.6341.8750.000%


Trial Factoring results:
5758596061626364656667686970717273
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-10-15ANONYMOUSv4_computers212532.36000e-5
2000-02-09ANONYMOUSv4_computers212544.72000e-5
2000-04-19ANONYMOUSv4_computers212560.000
2001-04-29ANONYMOUSv4_computers212570.000
2002-01-22ANONYMOUSv4_computers212580.001
2003-08-25ANONYMOUSv4_computers212590.001
2003-11-08ANONYMOUSv4_computers212600.002
2008-10-01DerekManual testing212640.037
2008-12-12Sturle Sundeestis.flu2642650.073
2008-12-13ANONYMOUShome-desktop2652660.147
2008-12-16Gymnasium_Raublingb22662670.294
2009-04-20The Magic ForestGuest2672680.588


ECM factoring results:
No ECM results for M50877271


Lucas-Lehmer results:
No L-L results for M50877271


PRP results:
No PRP results for M50877271


CERT results:
No CERT results for M50877271


P-1 factor-bounds graph:
102
103
104
102
103
104
105
106
TF factor-bounds graph:
268
267
266
265
264
260
259
258
257
256
254
253
this exponent TF target: 73
TF double-checked to: 67
250
260
270
280
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Last modified: 2024-03-13T02:15:48+00:00