4^32-1=(2^16+1)(2^16-1)
=(2^16+1)(2^8+1)(2^8-1)
=(2^16+1)(2^8+1)(2^4+1)(2^4-1)
=(2^16+1)(2^8+1)(2^4+1)(2^2+1)(2^2-1)
10-20之间的只有:2^4+1和2^4-1
即:15 17
4^32-1=(2^16+1)(2^16-1)
=(2^16+1)(2^8+1)(2^8-1)
=(2^16+1)(2^8+1)(2^4+1)(2^4-1)
=(2^16+1)(2^8+1)(2^4+1)(2^2+1)(2^2-1)
10-20之间的只有:2^4+1和2^4-1
即:15 17