$L = \{ 0^p | \, p \,\text{ is prime} \}$ is not regular
36943
How to prove that $L=${$a^p$: p is prime} isn't regular?
55864
Is there a null sequence that is in not in $\ell_p$ for any $p<\infty$?
131497
Maximal ideal not containing the set of powers of an element is prime
141418
When is $\mathbb{F}_p[x]/(x^2-2)\simeq\mathbb{F}_p[x]/(x^2-3)$ for small primes?
140550
Irreducible element iff prime norm in Gaussian integers?
91750
$l^p$ not norm, $p<1$
83173
Prove linear combinations of logarithms of primes over $\mathbb{Q}$ is independent
96132
$R$ integral domain : $u\in R^*, a \text{ is prime} \iff au \text{ is prime}$
23153
$\bmod p\!:\ x^2\equiv 1\iff x\equiv \pm1\ $ for prime $p$
93641
A maximal ideal among those avoiding a multiplicative set is prime
96844
Prove that 10101...10101 is NOT a prime.
83023
From axiom of regularity, how can I prove $x \notin y \lor y \notin x$
78342
When is $\phi(n)$ a prime number?
56229
On the difference between consecutive primes
152109
In a UFD if $x$ is irreducible, then $(x)$ is prime
137646
show that language $L'$ is regular (given $L$ regular)
68688
n-th prime number is less than $4^n$