Is 2017^4+4^{2017} a Prime Number?

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In summary, there are several mathematical formulas and algorithms that can be used to determine if a number is prime, but they may not always provide a definitive answer. 2017^4+4^{2017} cannot be expressed as a product of two or more prime numbers, and one way to prove its primality is through a proof by contradiction. There are no known patterns or special properties associated with the number that can help determine its primality, and the size of the number does not significantly affect its likelihood of being prime.
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Is $2017^4+4^{2017}$ a prime?
 
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anemone said:
Is $2017^4+4^{2017}$ a prime?

\(\displaystyle \begin{align*}2017^4+4^{2017}&=(2017^2)^2+(2^{2017})^2 \\
&=(2017^2+2^{2017})^2-2\cdot2017^2\cdot2^{2017} \\
&=(2017^2+2^{2017})^2-2017^2\cdot2^{2018} \\
&=(2017^2+2^{2017}-2017\cdot2^{1009})(2017^2+2^{2017}+2017\cdot2^{1009})\end{align*}\)

\(\displaystyle Q.E.D.\)
 
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anemone said:
Is $2017^4+4^{2017}$ a prime?

$2017^4 + 4^{2017}= (2017^2)^2 + (2^{2017})^2 + 2 * 2017^2 * 2^ {2017} - 2017^2 * ( 2^{1009})^2$
= $(2017^2+ 2^{2017})^2 - (2017 * 2^{1009})^2 $
= $(2017^2+ 2^{2017}+ 2017 * 2^{1009}) (2017^2+ 2^{2017}- 2017 * 2^{1009})$

it not a prime

edit: I posted my solution dispite the fact that gregs' solution came but I did not copy it
 
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Thanks both for participating! :D
 

FAQ: Is 2017^4+4^{2017} a Prime Number?

Is it possible to determine if 2017^4+4^{2017} is a prime number using a mathematical formula or algorithm?

Yes, there are several mathematical formulas and algorithms that can be used to determine if a number is prime. However, these methods may not always provide a definitive answer and may require further analysis or proof.

Can 2017^4+4^{2017} be expressed as a product of two or more prime numbers?

No, 2017^4+4^{2017} cannot be expressed as a product of two or more prime numbers. This is because it is an odd number and any odd number greater than 1 can only be expressed as a product of one and itself, which are both prime numbers.

How can we prove that 2017^4+4^{2017} is a prime number?

One way to prove that a number is prime is by using a proof by contradiction. In this case, we can assume that 2017^4+4^{2017} is not a prime number and show that this leads to a contradiction, thus proving that it is indeed a prime number.

Are there any patterns or special properties associated with 2017^4+4^{2017} that can help determine if it is a prime number?

There are no known patterns or special properties associated with 2017^4+4^{2017} that can help determine its primality. In general, determining if a number is prime often requires a combination of mathematical techniques and methods and may not be easily identifiable through patterns alone.

How does the size of 2017^4+4^{2017} affect its likelihood of being a prime number?

The size of a number does not necessarily determine its likelihood of being prime. While larger numbers may seem less likely to be prime, there are many large prime numbers that have been discovered. In the case of 2017^4+4^{2017}, its size does not have a significant impact on its likelihood of being a prime number.

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