is 2 56486953 - 1
has 17004268 decimal digits
takes 119.721 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
Actual2718.463563.3803 %----8.463563.3803 %
Target27333.863564.3836 %4000006500000012.04574.0638 %45.909165.8309 %
Difference-2-25.4000-1.0033 %-400000-65000000-12.0457-4.0638 %-37.4456-2.4507 %

Known prime factors (1 factor, 72.6 bits, 0.00012860% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
5648695373761725231232935372572272.64365290940043476
22 × 7 × 193 × 76289 × 158371
2012-04-267628915837127.9110.24820.4771

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2012-04-26jbaffordsaturn2272.6431.7820.000%


Trial Factoring results:
5758596061626364656667686970717273
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-12-15ANONYMOUSv4_computers212532.12000e-5
2000-03-08ANONYMOUSv4_computers212544.25000e-5
2000-06-11ANONYMOUSv4_computers212560.000
2001-09-22ANONYMOUSv4_computers212570.000
2002-10-07ANONYMOUSv4_computers212580.001
2022-06-27LordJuliusManual testing21263
2008-07-29Sturle Sundeagrell.ifi2632640.033
2008-07-29Sturle Sundegehry.ifi2642650.066
2008-07-31James HeinrichQ66002652670.397
2009-11-22bjetGodzillica2672680.529
2011-04-19workerthreadVostro12682691.058
2011-06-26XyzzyManual testing2692702.117
2011-08-26Per Jessenbeaufort42702714.233


ECM factoring results:
No ECM results for M56486953


Lucas-Lehmer results:
No L-L results for M56486953


PRP results:
No PRP results for M56486953


CERT results:
No CERT results for M56486953


P-1 factor-bounds graph:
103
104
105
103
104
105
106
TF factor-bounds graph:
271
270
269
268
267
265
264
263
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