--Copyright The Numerical Algorithms Group Limited 1994.
--The first two (2152302898747 and 3474749660383) are the only strong
--pseudoprimes bases 2,3,5,7,11 less than 10^13: the remaining three
--are the only Carmichael numbers less than 10^16 with this property.
n := 6763*10627*29947 
prime?(n)  
factor(n)
n := 1303*16927*157543  
prime?(n)
factor(n)
n := 3739*18691*153259  
prime?(n)
factor(n)
n := 46411*232051*417691  
prime?(n)
factor(n)
n := 21319*106591*3005839  
prime?(n)
factor(n)
