is 2 1302683 - 1
has 392147 decimal digits
takes 0.041 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L23378811E6C5CAA4double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26722.809868.6567 %50000005050000001.481710.4416 %24.291571.9294 %
Target2600.117965.0000 %55001800000.00070.9354 %0.118665.3274 %
Difference+7+22.6919+3.6567 %+4994500+504820000+1.4810+9.5062%+24.1729+6.6021 %

Known prime factors (3 factors, 230.7 bits, 0.01770745% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1302683280820704146437095932064.60610778551042212
22 × 33 × 6911 × 14440949
2013-06-136911144409493.03780.03650.0675
130268387459280916143375611912272.8893356890391451465
32 × 5 × 11 × 31 × 8363 × 26158219
2018-04-20836326158219970.140.06590.1223
1302683111923419131319350202232369532993.1764295880852491333279172
22 × 3 × 41 × 4742357 × 1841165721463
2018-04-27474235718411657214632.104e+94,610.28,610.2

4 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2003-09-21Team Prime Ribv4_computers1000010000006--0.0032.929%
2003-09-21Xyzzyv4_computers1000010000006--0.0032.929%
2006-01-15Jossv4_computers2400024000--0.0011.001%
2006-01-15Jossv4_computers1600016000--0.0010.760%
2006-01-15Jossv4_computers3400034000--0.0021.241%
2016-03-17alpertronManual testing5000001500000012
skipped known factor: 28082070414643709593
---9.336%
2021-09-03Dylan Delgadolaptop-ryzen737005000000505000000
skipped known factor: 28082070414643709593
skipped known factor: 8745928091614337561191
--1.48216.870%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2001-10-27ANONYMOUSv4_computers212570.015
2003-06-17ANONYMOUSv4_computers212580.029
2022-03-07LordJuliusManual testing258260
2009-02-14Sturle Sundegoldiek.ifi2602610.118
2011-05-09XyzzyManual testing2612620.236
2013-01-03dbaughManual testing2622630.754


ECM factoring results:
Total ECM effort:20.657 GHz-days
Estimated T-Level:25.701
DigitsB1CompleteFacMiss
201100014.5380.000%
25500001.64019.395%
302500000.14086.925%
3510000000.01099.024%


ECM Summary

B1B2factorcurvesGHz-days
10.116
5000050000001294.843
500005000000552.123
500005000000642.470
250000350000005011.11


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2002-09-22ANONYMOUSv4_computers23378811E6C5CAA40.041


PRP results:
dateuseridcompidcofactorsres64
2017-09-30Oliver KruseGTX-3
28082070414643709593
13BF30C18E20B5B6
2017-11-04kkmrkkblmbrbkc4.xlarge
28082070414643709593
13BF30C18E20B5B6
2018-04-22Oliver KruseGTX-3
28082070414643709593
8745928091614337561191
28426D4EB5D41AF7
2018-04-22ATHwork200557
28082070414643709593
8745928091614337561191
28426D4EB5D41AF7
2018-04-29Oliver KruseGTX-0
28082070414643709593
8745928091614337561191
11192341913131935020223236953
28426D4EB5D41AF7


CERT results:
No CERT results for M1302683


P-1 factor-bounds graph:
B1 = 5000000, B2 = 505000000 (P-1 stage 2)
B1 = 5000000 (P-1 stage 1)
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 10000, B2 = 1000000 (P-1 stage 2)
B1 = 34000 (P-1 stage 1)
B1 = 24000 (P-1 stage 1)
B1 = 16000 (P-1 stage 1)
B1 = 10000 (P-1 stage 1)
102
103
104
105
106
107
102
103
104
105
106
107
108
109
1010
1011
1012
1013
TF factor-bounds graph:
263
262
261
260
258
257
this exponent TF target: 60
TF double-checked to: 67
ECM T-Level=25.7 ~= 69-bit
250
260
270
280
290
2100
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Last modified: 2024-03-13T02:15:48+00:00