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From: Arno Welzel <usenet@arnowelzel.de>
Newsgroups: comp.lang.php
Subject: Re: Competition.
Date: Thu, 14 Jan 2021 14:03:39 +0100
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Y A:

> Arno Welzel kirjutas esmaspäev, 11. jaanuar 2021 kl 02:54:38 UTC+2:
>> I I:
>>> Who will post the cross sum of following number first, will get an adorable reward from me. 
>>>
>>> The number: 
>>> 58349863148967341986793418678943167894317568943579812347643263461438776834177468314765864533703574653715456716465804656089576907569568456680257542768434686845796847604780607596864802468874265807426587026578406466539046579467684906749046758049663588463065836688638658768635806365889683658746862486247487652774625076485806648907696785970467957869053868763688046236880752825686569877668097860897676807746897456368844688745768468242622686282862869874986865749685796854096857706759759674569074359357697539375903576096780074367589368590356896686539
>> 2977 
>>
>> And - what's the award? 
>>
>>
>> -- 
>> Arno Welzel 
>> https://arnowelzel.de
> 
> This is not the number, that I have on my paper.

Then your number is wrong. 2977 is the cross sum of all digits above:

<?php

$value =
'58349863148967341986793418678943167894317568943579812347643263461438776834177468314765864533703574653715456716465804656089576907569568456680257542768434686845796847604780607596864802468874265807426587026578406466539046579467684906749046758049663588463065836688638658768635806365889683658746862486247487652774625076485806648907696785970467957869053868763688046236880752825686569877668097860897676807746897456368844688745768468242622686282862869874986865749685796854096857706759759674569074359357697539375903576096780074367589368590356896686539';

$n = 0;
for($i=0; $i<strlen($value); $i++) {
	$n+=(int)substr($value, $i, 1);
}

echo $n;



-- 
Arno Welzel
https://arnowelzel.de