Thread: 31*10^2-13
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Old 2020-03-20, 10:23   #1
enzocreti
 
Mar 2018

2·5·53 Posts
Default 31*10^2-13

Consider the example


(31*10^2-13)/9=7^3




are there other primes p and q (with p the reverse of q) besides 31 and 13, such that




(p*10^2-q)/9=c^3 for c>0?
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