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September 2017 Update

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Ingy döt Net 2017-09-23 10:01:46 +02:00
parent bba7bfd280
commit ba8067c3b7
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Task/Modular-exponentiation/OoRexx/modular-exponentiation.rexx Normal file
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/* Modular exponentiation */
numeric digits 100
say powerMod(,
2988348162058574136915891421498819466320163312926952423791023078876139,,
2351399303373464486466122544523690094744975233415544072992656881240319,,
1e40)
exit
powerMod: procedure
use strict arg base, exponent, modulus
exponent=exponent~d2x~x2b~strip('L','0')
result=1
base = base // modulus
do exponentPos=exponent~length to 1 by -1
if (exponent~subChar(exponentPos) == '1')
then result = (result * base) // modulus
base = (base * base) // modulus
end
return result