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−  == [http://projecteuler.net/index.php?section=view&id=131 Problem 131] ==
 +  Do them on your own! 
−  Determining primes, p, for which n3 + n2p is a perfect cube.
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−  Solution:
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−  == [http://projecteuler.net/index.php?section=view&id=132 Problem 132] ==
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−  Determining the first forty prime factors of a very large repunit.
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−  Solution:
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−  == [http://projecteuler.net/index.php?section=view&id=133 Problem 133] ==
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−  Investigating which primes will never divide a repunit containing 10n digits.
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−  Solution:
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−  == [http://projecteuler.net/index.php?section=view&id=134 Problem 134] ==
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−  Finding the smallest positive integer related to any pair of consecutive primes.
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−  Solution:
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−  == [http://projecteuler.net/index.php?section=view&id=135 Problem 135] ==
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−  Determining the number of solutions of the equation x2 − y2 − z2 = n.
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−  Solution:
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−  == [http://projecteuler.net/index.php?section=view&id=136 Problem 136] ==
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−  Discover when the equation x2 − y2 − z2 = n has a unique solution.
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−  Solution:
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−  == [http://projecteuler.net/index.php?section=view&id=137 Problem 137] ==
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−  Determining the value of infinite polynomial series for which the coefficients are Fibonacci numbers.
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−  Solution:
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−  == [http://projecteuler.net/index.php?section=view&id=138 Problem 138] ==
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−  Investigating isosceles triangle for which the height and base length differ by one.
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−  Solution:
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−  == [http://projecteuler.net/index.php?section=view&id=139 Problem 139] ==
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−  Finding Pythagorean triangles which allow the square on the hypotenuse square to be tiled.
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−  Solution:
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−  == [http://projecteuler.net/index.php?section=view&id=140 Problem 140] ==
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−  Investigating the value of infinite polynomial series for which the coefficients are a linear second order recurrence relation.
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−  Solution:
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