is 2 5491303 - 1
has 1653047 decimal digits
takes 0.867 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26810.854466.1765%20000000036200000000494.910819.8019%505.765272.8742%
Target2662.689465.1515%340006500000.01552.1126%2.704965.8877%
Difference+2+8.1650+1.0250%+199966000+36199350000+494.8954+17.6894%+503.0604+6.9865%

Known prime factors (8 factors, 416.4 bits, 0.00758237% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
549130354913031825.7115
5
-158.149e-132.789e-74.660e-7
549130313064468793371340.249118956
22 × 3 × 23 × 431
2008-09-08234314.663e-81.036e-51.072e-5
549130323591516296491341.101214808
23 × 11 × 2441
2008-09-081124417.977e-83.283e-55.687e-5
5491303237684790269591444.4342164193
2164193
2008-09-08121641936.146e-70.02700.0504
5491303139279080100919531753.6291268178792
23 × 3 × 52840783
2014-10-028528407830.00030.65921.2312
549130314816320136730802791960.362134907144413
29 × 251 × 673 × 27539
2016-02-02673275390.04500.00050.0006
5491303939909425434708628172066.3498558163931536
24 × 32 × 47 × 167 × 1231 × 6151
2019-06-17123161513.77100.00030.0006
5491303280426828058972195011956732684.5362553372378641027412
22 × 32 × 7 × 23 × 467 × 2141 × 2377 × 185363
2019-08-0423771853631,011,8270.00280.0043

247 Composite Factors:
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2019-08-04alpertronlaptop2300000001000000000122684.5366.8691.73413.7413.036%
2021-10-14Seth_TrManual testing20000000036200000000-
skipped known factor: 54913031
skipped known factor: 1306446879337
skipped known factor: 2359151629649
skipped known factor: 23768479026959
skipped known factor: 13927908010091953
skipped known factor: 1481632013673080279
skipped known factor: 93990942543470862817
skipped known factor: 28042682805897219501195673
--494.9--19.802%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2008-09-08Will EdgingtonManual testing??40.249131.99535e-81.8734.31037e-8
2008-09-08Will EdgingtonManual testing??41.101132.64200e-81.8735.70724e-8
2008-09-08Will EdgingtonManual testing??44.434141.87803e-71.8734.05693e-7
2014-10-02TJAOIManual testing253254*53.629170.0001.8730.000
2022-05-30Magallan3sManual testing2126040.249134.66275e-81.8731.00725e-7
2022-05-30Magallan3sManual testing2126053.629170.0001.8730.001
2022-05-30Magallan3sManual testing2126041.101137.97680e-81.8731.72315e-7
2022-05-30Magallan3sManual testing2126044.434146.14587e-71.8731.32763e-6
2022-05-30Magallan3sManual testing2126025.71188.14907e-131.8731.76036e-12
2016-02-02TJAOIManual testing260261*60.362190.0171.8170.036
2022-11-16LordJuliusManual testing26026160.362190.0171.8170.036
2022-06-22LordJuliusManual testing261263--0.235--
2022-06-22LordJuliusManual testing263264--0.358--
2022-06-22LordJuliusManual testing264265--0.680--
2022-06-22LordJuliusManual testing265266--1.361--
2019-06-18Seth_TrManual testing26626766.349201.0821.7612.197
2021-08-06Seth_TrManual testing266267
skipped known factors(?)
--2.722--
2019-12-28Seth_TrManual testing267268--5.443--


ECM factoring results:
Total ECM effort:14.563 GHz-days
Estimated T-Level:20.977
DigitsB1CompleteFacMiss
20110002.08312.451%
25500000.19582.258%
302500000.01298.765%


ECM Summary

B1B2factorcurvesGHz-days
5000071396795014.56


Lucas-Lehmer results:
No L-L results for M5491303


PRP results:
dateuseridcompidcofactorsres64PRP
2017-12-03ATHec2-1xd
54913031
1306446879337
2359151629649
23768479026959
13927908010091953
1481632013673080279
CA10D53CBD728E__no
2018-03-23kkmrkkblmbrbkold
54913031
1306446879337
2359151629649
23768479026959
13927908010091953
1481632013673080279
CA10D53CBD728E__no
2019-06-19Niels_Mache_NextcloudSuperDry-X
54913031
1306446879337
2359151629649
23768479026959
13927908010091953
1481632013673080279
93990942543470862817
CA10D53CBD728EE6no
2019-08-06nordinordiputer867FAE43FA1533__?
2019-08-07Chang Chia-Tcheexbbbe-lt
54913031
1306446879337
2359151629649
23768479026959
13927908010091953
1481632013673080279
93990942543470862817
28042682805897219501195673
CA10D53CBD728EE6no


P-1 factor-bounds graph:
B1 = 200000000, B2 = 36200000000 (P-1 stage 2)
B1 = 200000000 (P-1 stage 1)
B1 = 30000000, B2 = 1000000000 (P-1 stage 2)
B1 = 30000000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-11-16T21:26:44+00:00