user66749: I can not find a concrete reference to how many bits long the (input) seed for the  randomSeed() function is for Arduino given here
https://www.arduino.cc/reference/en/language/functions/random-numbers/randomseed/
In the above webpage , though it is the official Arduino document for randomSeed(), it does not concretely say if the maximum bit length of the seed is 8,16 or 32 bits.
I think it is 16 bits long (in other words the seed is in the
range of integers 0 and 65535). So for example the maximum input to randomSeed would be expressed as randomSeed(65535).
But I do not know for sure if the seed input is 16 bits at most.
So my question is the seed used in randomSeed() 16 bit length at most  (thus having a maximum value of 65535).
32 bits is comparable to a 32bit windows desktop computers so I think 32 bits is too large for the input seed to randomSeed(). I am also using an Arduino Uno with Arduino IDE version 1.6.7 (if that matters regarding the input bit length of the seed).

user4143: As stated on the page you link to:

seed: number to initialize the pseudo-random sequence. Allowed data types: unsigned long.

Therefore it's 32 bits, since that is what unsigned long is.

66749: <p>I can not find a concrete reference to how many bits long the (input) seed for the  randomSeed() function is for Arduino given here</p>
<p><a href="https://www.arduino.cc/reference/en/language/functions/random-numbers/randomseed/" rel="nofollow noreferrer">https://www.arduino.cc/reference/en/language/functions/random-numbers/randomseed/</a></p>
<p>In the above webpage , though it is the official Arduino document for randomSeed(), it does not concretely say if the maximum bit length of the seed is 8,16 or 32 bits.</p>
<p>I think it is 16 bits long (in other words the seed is in the
range of integers 0 and 65535). So for example the maximum input to randomSeed would be expressed as randomSeed(65535).</p>
<p>But I do not know for sure if the seed input is 16 bits at most.
So my question is the seed used in randomSeed() 16 bit length at most  (thus having a maximum value of 65535).
32 bits is comparable to a 32bit windows desktop computers so I think 32 bits is too large for the input seed to randomSeed(). I am also using an Arduino Uno with Arduino IDE version 1.6.7 (if that matters regarding the input bit length of the seed).</p>
 4143: <p>As stated on the page you link to:</p>
<blockquote>
<p><code>seed</code>: number to initialize the pseudo-random sequence. Allowed data types: <code>unsigned long</code>.</p>
</blockquote>
<p>Therefore it's 32 bits, since that is what <code>unsigned long</code> is.</p>
