readme update

README.md

@@ -1,7 +1,19 @@
 # haskell-math
 
+## Modular square roots algorithms
+
+### Tonelli Shanks
+file: `TonelliShanks.hs`
+
+## primality test algorithms
+
+### Fermat's prime test
+file: `fermat-prime-test.hs`
+
 ## factorization algorithms
 
-### Fermat's factorization algorithm
+### Fermat's factorization
+file: `fermat-factorization.hs`
 
-### Pollard's p-1 algorithm
+### Pollard's p-1
+file: `PollardPminus1.hs`