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Fasten the solution to 10 in bash by halving the tested integers

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This commit is contained in:
Felix Cremer 2017-08-09 12:40:11 +02:00
parent ed772e7550
commit f925e1c86c
1 changed files with 5 additions and 3 deletions
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8
e0010/euler0010.bash
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@ -1,10 +1,12 @@
#!/usr/bin/bash #!/bin/bash
# I have yet to see this script coming to an end... # I have yet to see this script coming to an end...
declare -i primeSum=0 declare -i primeSum=2
sequence=$(seq 3 2 2000000)
for num in {2..2000000}; do for num in $sequence; do
echo $num
[[ "$(factor $num | cut -d " " -f2)" != $num ]] || primeSum=$(( $primeSum + $num )) [[ "$(factor $num | cut -d " " -f2)" != $num ]] || primeSum=$(( $primeSum + $num ))
done done
echo "$primeSum" echo "$primeSum"