Math Problem Statement

Let n be an integer such that 1271 <= n and (n, floor(sqrt(n!))) = 1. What is the smallest possible value of n satisfying the conditions above?

Solution

Given the problem, we need to find the smallest integer nn such that 1271n1271 \leq n and gcd(n,n!)=1\gcd(n, \lfloor \sqrt{n}! \rfloor) = 1.

To solve this problem, let's break it down into steps:

  1. Understanding the Expression n!\lfloor \sqrt{n} \rfloor!:

    • n\sqrt{n} is the square root of nn.
    • n\lfloor \sqrt{n} \rfloor is the greatest integer less than or equal to n\sqrt{n}.
    • n!\lfloor \sqrt{n} \rfloor! is the factorial of n\lfloor \sqrt{n} \rfloor.
  2. Finding the Smallest nn:

    • We need to find the smallest nn where gcd(n,n!)=1\gcd(n, \lfloor \sqrt{n}! \rfloor) = 1, which means nn must be coprime with n!\lfloor \sqrt{n}! \rfloor.
  3. Iterative Approach:

    • Start at n=1271n = 1271.
    • Calculate n\lfloor \sqrt{n} \rfloor.
    • Compute n!\lfloor \sqrt{n} \rfloor!.
    • Check if gcd(n,n!)=1\gcd(n, \lfloor \sqrt{n}! \rfloor) = 1.
    • Increment nn until the condition is satisfied.

Let's calculate this to find the smallest possible nn.It seems there was an issue with referencing the variable nn inside the function. Let's correct that by ensuring the starting value of nn is properly passed into the function. I'll fix this and recalculate the smallest possible nn.The smallest possible value of nn that satisfies the given conditions is n=1277n = 1277.

Would you like more details on the solution, or do you have any further questions?

Here are some related questions you might find interesting:

  1. How does the factorial of a number relate to the number itself in terms of divisibility?
  2. What are some properties of the greatest common divisor (GCD)?
  3. How does the floor function affect the calculation of square roots in integer mathematics?
  4. Why is nn not coprime with n!\lfloor \sqrt{n}! \rfloor for values less than 1277?
  5. How would this problem change if we used a different base, such as the cube root instead of the square root?

Tip: When dealing with problems involving the greatest common divisor, it's useful to remember that the GCD of two numbers is the largest number that divides both without leaving a remainder.

Ask a new question for Free

By Image

Drop file here or Click Here to upload

Math Problem Analysis

Mathematical Concepts

Number Theory
Greatest Common Divisor
Factorials
Square Roots

Formulas

gcd(n, floor(sqrt(n!))) = 1
sqrt(n)
n!

Theorems

Properties of gcd
Factorial Growth

Suitable Grade Level

Grade 10-12 or early university level