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Derek
  • Member for 5 years, 4 months
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12 votes
1 answer
318 views

Why do all Giuga numbers have exactly one odd prime factor which is congruent to 1 (mod 4) ?

10 votes
1 answer
173 views

How can you verify that a 3 by 3 unimodular matrix generates an infinite number of Fermat near misses?

5 votes
1 answer
146 views

Minimal degree faithful permutation representations of some finite simple groups

4 votes
0 answers
114 views

Why seven out of eight Primary pseudoperfect numbers only have odd prime factors which are congruent to $3 \pmod{4}$?

3 votes
0 answers
105 views

Giuga numbers, when reduced modulo 288, form something resembling an arithmetic progression?

3 votes
2 answers
116 views

Given a large prime, how can I find two perfect squares that add up to that prime?

2 votes
2 answers
272 views

Can 422215686281216 be expressed as the sum or difference of two fifth powers?

2 votes
2 answers
169 views

Why is this expression an integer? [closed]

2 votes
4 answers
134 views

Can anyone help me solve this Pell equation?

1 vote
1 answer
361 views

How can I tell whether an integer is the sum of two fourth powers

1 vote
1 answer
139 views

Can 13477627276039606281933936961 be expressed as a sum of two fourth powers?

1 vote
1 answer
73 views

How do I Transform a Quadratic expression into a Pell Equation?

1 vote
3 answers
105 views

Handy Rules For Determining Whether an Integer is the Sum of Two Fourth Powers

1 vote
1 answer
290 views

Why do Sylvester numbers, when reduced modulo $864$, form an arithmetic progression $7, 43, 79, 115, 151, 187, 223, \ldots$?

1 vote
1 answer
78 views

Is there a name for this special type of matrix?

0 votes
2 answers
140 views

Proof that Sylvester numbers, when reduced modulo 864 , form an arithmetic progression 7,43,79,115,151,187,223,…

0 votes
2 answers
108 views

An interesting question about greatest common divisor (gcd) of three positive integers which form a primitive Pythagorean triple

0 votes
1 answer
90 views

How can I compute a 3 by 3 unimodular matrix which produces an infinite number of Fermat near misses?

0 votes
1 answer
167 views

Is $524154366113525716400386$ the sum of two fourth powers? [closed]

0 votes
1 answer
96 views

Slight inaccuracy in Rogers – Ramanujan Identities?

0 votes
2 answers
80 views

Can 38012 460109 621768 889218 be expressed as a sum of two fourth powers?

0 votes
1 answer
120 views

Can 406558142992290754819586 be expressed as the sum of two fourth powers?

0 votes
1 answer
135 views

Diophantine Equations - 4th Powers / Computational Number Theory

0 votes
1 answer
93 views

Diophantine Equations - 4th Powers / Computational Number Theory

0 votes
1 answer
123 views

Complicated unusual Pell equation

0 votes
2 answers
113 views

Can anyone solve this Pell equation?

-1 votes
1 answer
74 views

Is there convincing numerical evidence for this conjecture?

-1 votes
1 answer
166 views

Can 2140138088471960538384538519958130596908 be expressed as the sum, or difference, of three fifth powers?

-5 votes
2 answers
160 views

Can $406014677132263504491682$ be the sum of two fourth powers? [closed]