is 2 58328503 - 1
has 17558630 decimal digits
takes 123.624 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
Actual27332.794364.3836%550000110000003.44004.1114%36.234365.8479%
Target27332.794364.3836%40000010400000018.57574.0802%51.370065.8368%
Difference---+150000-93000000-15.1357+0.0312%-15.1357+0.0111%

Known prime factors (1 factor, 65.8 bits, 0.00011276% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
58328503630252140818770603292065.773540260857388
22 × 7 × 19295030621		2015-01-257192950306210.19193,230.76,034.0

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2012-11-03Brian ChanBGC55000011000000---3.440--4.111%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-12-23ANONYMOUSv4_computers21253--2.05718e-5--
2000-02-09ANONYMOUSv4_computers21254--4.11436e-5--
2000-06-28ANONYMOUSv4_computers21256--0.000--
2000-06-29ANONYMOUSv4_computers21256--0.000--
2001-07-17ANONYMOUSv4_computers21257--0.000--
2002-09-22ANONYMOUSv4_computers21258--0.001--
2003-07-30ANONYMOUSv4_computers21259--0.001--
2003-12-02ANONYMOUSv4_computers21261--0.005--
2003-12-13ANONYMOUSv4_computers21261--0.005--
2022-06-27LordJuliusManual testing261263--0.022--
2008-10-28KYOJI_KAMEIwlaptop263264--0.034--
2008-10-28KYOJI_KAMEIwlaptop264265--0.064--
2008-10-28KYOJI_KAMEIwlaptop265266--0.128--
2015-01-25BloodIceManual testing265266*65.773200.067283.10.153
2008-10-28KYOJI_KAMEIwlaptop266267--0.256--
2009-05-31Sturle Sundeghirardelli.ifi267268--0.512--
2011-05-02Tom DuellManual testing268269--1.025--
2011-05-02Tom DuellManual testing269270--2.050--
2011-05-02Tom DuellManual testing270271--4.100--
2012-07-17XyzzyManual testing271272--8.199--
2012-09-18Donna NobleManual testing272273--16.40--


ECM factoring results:
No ECM results for M58328503


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2013-05-10kallsopi583CD87E99AFACF__123.6


PRP results:
No PRP results for M58328503


P-1 factor-bounds graph:
B1 = 550000, B2 = 11000000 (P-1 stage 2)
B1 = 550000 (P-1 stage 1)
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TF factor-bounds graph:
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this exponent TF target: 73
TF double-checked to: 67.8
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Last modified: 2023-06-05T21:50:05+00:00