is 2 6326849 - 1
has 1904572 decimal digits
takes 1.121 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L10BD6811621E518Adouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2689.420966.1765 %700000150000000.38015.5383 %9.801068.0497 %
Target2662.334265.1515 %4500050000000.08092.5679 %2.415266.0464 %
Difference+2+7.0867+1.0250 %+655000+10000000+0.2992+2.9705%+7.3858+2.0034 %

Known prime factors (1 factor, 75.3 bits, 0.00118964% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
6326849454558734443473098481692375.2673592299535230516
22 × 3 × 112 × 270551 × 9144433
2020-03-1027055191444332,004.20.19380.2391

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2001-01-21ANONYMOUSv4_computers2500025000--0.0060.544%
2001-04-15Stephen Woodv4_computers2500025000--0.0060.544%
2011-06-18markrtiny16000035200006--0.0884.256%
2020-03-10takahashivaio700000150000001222375.2670.3806.664%


Trial Factoring results:
575859606162636465666768
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1998-07-11ANONYMOUSv4_computers212620.049
2016-02-23Mark RoseManual testing2622630.155
2014-08-17NesowaManual testing2632640.310
2014-08-23lycornManual testing2642650.591
2015-10-19snme2pm1Manual testing2652661.181
2016-03-25Gordon SpenceManual testing2662672.362
2018-06-04ramgeisManual testing2672684.724


ECM factoring results:
Total ECM effort:1.617 GHz-days
Estimated T-Level:1.154
DigitsB1CompleteFacMiss
20110000.23179.392%
25500000.02197.887%
302500000.00199.865%


ECM Summary

B1B2factorcurvesGHz-days
50000500000061.617


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-12-06ANONYMOUSv4_computers48D4F0920F75EEE71.121
1999-09-07ANONYMOUSv4_computers10BD6811621E518A1.121
1999-11-24ANONYMOUSv4_computers10BD6811621E518A1.121
2000-01-04ANONYMOUSv4_computers10BD6811621E518A1.121
2001-05-20Stephen Woodv4_computers10BD6811621E518A1.121


PRP results:
dateuseridcompidcofactorsres64
2020-03-10mrhw
45455873444347309848169
2D0F4C11EE19E5E9
2020-03-12arnaudstm-11-010
45455873444347309848169
2D0F4C11EE19E5E9


CERT results:
No CERT results for M6326849


P-1 factor-bounds graph:
B1 = 700000, B2 = 15000000 (P-1 stage 2)
B1 = 700000 (P-1 stage 1)
B1 = 160000, B2 = 3520000 (P-1 stage 2)
B1 = 160000 (P-1 stage 1)
B1 = 25000 (P-1 stage 1)
103
104
105
106
103
104
105
106
107
108
TF factor-bounds graph:
268
267
266
265
264
263
262
this exponent TF target: 66
TF double-checked to: 67
ECM T-Level=1.15 ~= -13-bit
250
260
270
280
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Last modified: 2024-03-13T02:15:48+00:00