is 2 4961707 - 1
has 1493623 decimal digits
takes 0.688 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LB5589A83ED2B7D56double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual273385.521468.4932 %500000001601351680501,763.026416.1139 %2,148.547873.5701 %
Target2651.470464.6154 %3400035000000.04482.4129 %1.515265.4692 %
Difference+8+384.0510+3.8778 %+49966000+160131668050+1,762.9816+13.7010%+2,147.0326+8.1009 %

Known prime factors (1 factor, 86.0 bits, 0.00173390% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
4961707790434743824928679888882232686.0317965350874456398573
137 × 3917 × 10259 × 1446857443
2022-05-161025914468574434,261,21815.84529.591

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2009-09-03Carsten Kossendeymother30000435000--0.0102.071%
2011-07-25Squeeky_SquirrelT7500_2200600009750006--0.0222.943%
2015-04-03mikrMSI12000004310000012--0.7008.842%
2022-05-16Denial140i5-84005000000016013516805022686.0312,25424.432%


Trial Factoring results:
5758596061626364656667686970717273
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1997-11-29ANONYMOUSv4_computers212610.031
2009-12-20markrrmst2612620.062
2011-11-13GrunwalderGIMPManual testing212630.322
2016-02-23Mark RoseManual testing2622630.198
2014-12-29VictordeHollanderManual testing2632651.149
2015-07-29snme2pm1Manual testing2652661.506
2017-10-26YxinityManual testing2662673.012
2018-06-05ramgeisManual testing2672686.024
2021-04-05TJAOIManual testing26826912.05
2021-04-23ANONYMOUSManual testing26927172.29
2021-04-26ANONYMOUSManual testing27127296.39
2022-04-17Denial140Manual testing272273192.8


ECM factoring results:
Total ECM effort:1.657 GHz-days
Estimated T-Level:1.731
DigitsB1CompleteFacMiss
20110000.34670.740%
25500000.03296.848%
302500000.00299.798%


ECM Summary

B1B2factorcurvesGHz-days
50000500000091.657


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-08-16Marco Mantovanelliv4_computersB5589A83ED2B7D560.688
2000-07-03ANONYMOUSv4_computersB5589A83ED2B7D560.688
2001-08-18ANONYMOUSv4_computersB5589A83ED2B7D560.688
2001-08-24ANONYMOUSv4_computersB5589A83ED2B7D560.688


PRP results:
dateuseridcompidcofactorsres64
2022-05-22ANONYMOUSdonato
79043474382492867988888223
6D984E90F55F0E3A


CERT results:
dateuseridcompid
2022-05-22carldsstlouis22


P-1 factor-bounds graph:
B1 = 50000000, B2 = 160135168050 (P-1 stage 2)
B1 = 50000000 (P-1 stage 1)
B1 = 1200000, B2 = 43100000 (P-1 stage 2)
B1 = 1200000 (P-1 stage 1)
B1 = 60000, B2 = 975000 (P-1 stage 2)
B1 = 60000 (P-1 stage 1)
B1 = 30000, B2 = 435000 (P-1 stage 2)
B1 = 30000 (P-1 stage 1)
103
104
105
106
107
108
103
104
105
106
107
108
109
1010
1011
1012
TF factor-bounds graph:
273
272
271
269
268
267
266
265
263
262
261
this exponent TF target: 65
TF double-checked to: 67
ECM T-Level=1.73 ~= -11-bit
250
260
270
280
290
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Last modified: 2024-03-13T02:15:48+00:00