is 2 2482349 - 1
has 747262 decimal digits
takes 0.172 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L3AF726565F89324Edouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26824.011567.6471 %2382500857701000.69657.5485 %24.708070.0892 %
Target2630.642965.0794 %110008000000.00541.3801 %0.648465.5613 %
Difference+5+23.3685+2.5677 %+2371500+84970100+0.6911+6.1684%+24.0596+4.5279 %

Known prime factors (1 factor, 76.4 bits, 0.00307794% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
24823491000623257026713428030472476.40520154765849336927
33 × 47 × 15882400196483
2021-02-1647158824001964836,165.187,028162,544

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2003-10-14ANONYMOUSv4_computers2048204800--0.0010.660%
2003-10-31Team Prime Ribv4_computers15000228750--0.0031.687%
2010-11-20JossManual testing2000020000--0.0020.621%
2011-01-21Oscar Östlin9500019475006--0.0204.242%
2014-09-02JossManual testing120856120856--0.0121.805%
2014-11-05mikrMSI23825008577010012--0.69711.222%


Trial Factoring results:
575859606162636465666768
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-05-02ANONYMOUSv4_computers212590.015
2016-02-23Mark RoseManual testing2592600.031
2009-01-14Sturle Sundeghini.ifi2602610.062
2012-06-10Sebastian HornbostelManual testing2612620.124
2013-08-21David CampeauManual testing2622630.395
2015-03-03VictordeHollanderManual testing2632640.791
2015-03-03VictordeHollanderManual testing2642651.505
2015-10-29ramgeisManual testing2652663.010
2017-07-22Gordon SpenceManual testing2662676.021
2019-07-17TJAOIManual testing26726812.04


ECM factoring results:
Total ECM effort:8.845 GHz-days
Estimated T-Level:21.744
DigitsB1CompleteFacMiss
20110003.7692.307%
25500000.34970.557%
302500000.02297.824%
3510000000.00199.897%


ECM Summary

B1B2factorcurvesGHz-days
500005000000978.753
50000500000010.092


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-08-07ANONYMOUSv4_computers3AF726565F89324E0.172
2018-05-30kkmrkkblmbrbkold3AF726565F89324E0.172


PRP results:
dateuseridcompidcofactorsres64
2021-02-17yoyorocks1
100062325702671342803047
DB51412E79E63628


CERT results:
dateuseridcompid
2021-02-17wally_olsoniodine


P-1 factor-bounds graph:
B1 = 2382500, B2 = 85770100 (P-1 stage 2)
B1 = 2382500 (P-1 stage 1)
B1 = 95000, B2 = 1947500 (P-1 stage 2)
B1 = 120856 (P-1 stage 1)
B1 = 95000 (P-1 stage 1)
B1 = 15000, B2 = 228750 (P-1 stage 2)
B1 = 20000 (P-1 stage 1)
B1 = 15000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 2048 (P-1 stage 1)
100
101
102
103
104
105
106
107
100
101
102
103
104
105
106
107
108
109
1010
1011
1012
1013
1014
TF factor-bounds graph:
268
267
266
265
264
263
262
261
260
259
this exponent TF target: 63
TF double-checked to: 67
ECM T-Level=21.74 ~= 56-bit
250
260
270
280
JSON version of this page
Last modified: 2024-02-09T03:30:02+00:00