`(5+1)(5^2+1)(5^4+1)(5^8+1)(5^16+1)(5^32+1)`
`=1/4. 24(5^2+1)(5^4+1)(5^8+1)(5^16+1)(5^32+1)`
`=1/4(5^2-1)(5^2+1)(5^4+1)(5^8+1)(5^16+1)(5^32+1)`
`=1/4(5^4-1)(5^4+1)(5^8+1)(5^16+1)(5^32+1)`
`=1/4(5^8-1)(5^8+1)(5^16+1)(5^32+1)`
`=1/4(5^16-1)(5^16+1)(5^32+1)`
`=1/4(5^32-1)(5^32+1)`
`=1/4(5^64-1)`
`=(5^64-1)/4`