N is the product of all the prime numbers less than 100.
Determine the last three digits of N.
*** For an extra challenge, solve this puzzle without the aid of a computer program.
(In reply to A child of 5 could do it..
A child of 5 could do it only with Father's . guidance.
I looped an excel command res= mod ( prevres*p(i),1000 ) and got the resul 070 in no time.