Hi,
I have a hard time factoring the number 71281426948143699070565 using
ecm.factor(). No result is given after a few minutes runtime. Though,
plain factor() happily factors the number. Factoring smaller or larger
numbers work fine with ecm.factor(), too. Just the single given number
seems to be problematic.
Am I doing something wrong? Can someone confirm?
system:
Ubuntu 22.04
sagemath 9.5-4 (via apt)
Intel Pentium N5000
(SageMath and Python beginner)
example code factoring numbers in the range [71281426948143699070565 - L,
71281426948143699070565 + L]:
# Odd number.
n = 71281426948143699070565
# Limit.
L = 2
# Iterate over interval [-L, L].
for i in range(-L, L + 1):
m = n + i
print("%d => %s" % (m, ecm.factor(m)))
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