is 2 56397763 - 1
has 16977419 decimal digits
takes 119.532 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L2332F6EA50AD98F2double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual27333.917064.3836 %1000000200000006.25454.9114 %40.171566.1328 %
Target27333.917064.3836 %4000006500000012.04574.0630 %45.962765.8307 %
Difference---+600000-45000000-5.7912+0.8484%-5.7912+0.3022 %

Known prime factors (1 factor, 101.0 bits, 0.00017905% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
56397763250420145730179233553080444113731100.98222201248100051347209736
23 × 3 × 7 × 61 × 167 × 11597 × 143387 × 7801289
2018-07-0414338778012892.980e+91.72292.4396

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2012-03-21curtiscwcm424--06L690000690000--2.1211.899%
2018-07-04Sid & AndyPterodactyl1000000200000006231100.9826.2544.911%


Trial Factoring results:
5758596061626364656667686970717273
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-12-15ANONYMOUSv4_computers212532.13000e-5
2000-03-08ANONYMOUSv4_computers212544.26000e-5
2000-06-11ANONYMOUSv4_computers212560.000
2001-09-22ANONYMOUSv4_computers212570.000
2002-09-29ANONYMOUSv4_computers212580.001
2016-02-23Mark RoseManual testing2582630.034
2008-07-23Sturle Sundekinner.ifi2632650.100
2008-07-25Sturle Sundeletov.ifi2652660.133
2008-07-26Sturle Sundeletov.ifi2662670.265
2010-01-18Sturle Sundekinner.ifi2672680.530
2011-04-18Torchwood InstituteHTPC-V642682691.060
2011-06-15XyzzyManual testing2692702.120
2011-11-15Aaron HavilandManual testing27027212.72
2016-01-22ANONYMOUSManual testing27227316.96


ECM factoring results:
No ECM results for M56397763


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2012-05-04curtiscwcm424--06L2332F6EA50AD98F2119.5


PRP results:
No PRP results for M56397763


CERT results:
No CERT results for M56397763


P-1 factor-bounds graph:
B1 = 1000000, B2 = 20000000 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
B1 = 690000 (P-1 stage 1)
104
105
106
104
105
106
107
108
TF factor-bounds graph:
273
272
270
269
268
267
266
265
263
258
257
256
254
253
this exponent TF target: 73
TF double-checked to: 67
250
260
270
280
290
2100
2110
JSON version of this page
Last modified: 2024-03-13T02:15:48+00:00