Using powermod in a loop

jds9973
11 ●1

Sorry if this question is naive, I have just started using Sage. I was playing around with Carmichael numbers and wanted to produce a list of a^n mod n for various values of a.

I thought the code for k in range(2,5): j = k.powermod(n,n)

would do what I wanted. But I get the error message 'int' object has no attribute 'powermod'

Any suggestions?

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answered 6 years ago

tmonteil
27483 ●32 ●205 ●519 http://wiki.sagemath.o...

The problem is that range produces Python int, not Sage integers, hence the powermod method is not avaiable. Just replace range with srange and it shoud work !

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answered 6 years ago

slelievre
17789 ●22 ●163 ●352 http://carva.org/samue...

Using pow(a, b, c) instead of a.powermod(b, c) should work.

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