Math

Elementary Number Theory Problems 3.3 Solution (David M. Burton's 7th Edition) - Q19 Members Public

My Solution for "In $1950$, it was proved that any integer $n > 9$ can be written as a sum of distinct odd primes. Express the integers $25$, $69$, $81$, and $125$ in this fashion."

Ran
Ran
Math

Elementary Number Theory Problems 3.3 Solution (David M. Burton's 7th Edition) - Q18 Members Public

My Solution for "(a) If $p$ is a prime and $p \not \mid b$, prove that in the arithmetic progression $$a, a + b, a + 2b, a + 3b, ...$$ every $pth$ term is divisible by $p$. [Hint: Because $gcd(p, b) = 1$, there exist integers $r$ and $s$ satisfying $pr+ bs = 1$....] "

Ran
Ran
Math

Elementary Number Theory Problems 3.3 Solution (David M. Burton's 7th Edition) - Q17 Members Public

My Solution for "In $1848$, de Polignac claimed that every odd integer is the sum of a prime and a power of $2$. For example, $55 = 47 + 2^{3} = 23 + 2^{5}$. Show that the integers $509$ and $877$ discredit this claim."

Ran
Ran
Math

Elementary Number Theory Problems 3.3 Solution (David M. Burton's 7th Edition) - Q16 Members Public

My Solution for "Let the sequence of primes, with $1$ adjoined, be denoted by $p_{0} = 1, $p_{1}$ = 2, $p_{2}$ = 3, p_{3} = 5, ....$ For each $n \geq 1$, it is known that there exists a suitable choice of coefficients $\epsilon_{k} = \pm 1$ such that ...

Ran
Ran
Math

Elementary Number Theory Problems 3.3 Solution (David M. Burton's 7th Edition) - Q15 Members Public

My Solution for "Another unanswered question is whether there exists an infinite number of sets of five consecutive odd integers of which four are primes. Find five such sets of integers."

Ran
Ran
Math

Elementary Number Theory Problems 3.3 Solution (David M. Burton's 7th Edition) - Q14 Members Public

My Solution for "Find a prime divisor of the integer $N = 4(3 \cdot 7 \cdot 11) - 1$ of the form $4n + 3$. Do the same for $N = 4(3 \cdot 7 \cdot 11 \cdot 15) - 1$. "

Ran
Ran
Math

Elementary Number Theory Problems 3.3 Solution (David M. Burton's 7th Edition) - Q13 Members Public

My Solution for "Apply the same method of proof as in Theorem 3.6 to show that there are infinitely many primes of the form $6n + 5$."

Ran
Ran
Math

Elementary Number Theory Chapter 3.3 Page 54, Why choose "$N = 4q_{1}q_{2} \cdots q_{s} - 1$"?(David M. Burton's 7th Edition) Members Public

Why does the author choose $N = 4q_{1}q_{2} \cdots q_{s} - 1$ when proving there are an infinite number of primes of the form $4n + 3$.

Ran
Ran
Math