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As I already wrote in my comment 3 days ago something like this should work

{% paginate craft.entries.section('mySection').limit(10) as pageInfo, pageEntries %}

{% for page, url in pageInfo.getPrevUrls(3) %}
    <a href="{{ url }}">{{ page }}</a>
{% endfor %}

<span class="current">{{ pageInfo.currentPage }}</span>

{% for page, url in pageInfo.getNextUrls(3) %}
    <a href="{{ url }}">{{ page }}</a>
{% endfor %}

{% if pageInfo.totalPages - pageInfo.currentPage > 3 %}
    <span>...</span>

    <a href="{{ pageInfo.lastUrl }}">{{pageInfo.totalPages}}</a>
{% endif %}

[EDIT]: In the above script you will come across situations where the gap sometimes occurs between consecutive numbers, which can look silly.

To fix this you can add a little extra logic to it:

{% set amountVisible = amountVisible|default(2) %}
{% if pageInfo.currentPage > amountVisible + 1 %}
    <a href="{{ pageInfo.firstUrl }}">1</a>

    {% if pageInfo.currentPage == amountVisible + 3 %}
        <a href="{{ pageInfo.getPageUrl(2) }}">2</a>
    {% elseif pageInfo.currentPage > amountVisible + 3 %}
        <span>...</span>
    {% endif %}
{% endif %}

{% for page, url in pageInfo.getPrevUrls(amountVisible) %}
    <a href="{{ url }}">{{ page }}</a>
{% endfor %}

<span class="current">{{ pageInfo.currentPage }}</span>

{% for page, url in pageInfo.getNextUrls(amountVisible) %}
    <a href="{{ url }}">{{ page }}</a>
{% endfor %}

{% if pageInfo.totalPages - pageInfo.currentPage > amountVisible %}
    {% if pageInfo.totalPages - pageInfo.currentPage == amountVisible + 2 %}
        <a href="{{ pageInfo.getPageUrl(pageInfo.totalPages - 1) }}">{{pageInfo.totalPages - 1}}</a>
    {% elseif pageInfo.totalPages - pageInfo.currentPage > amountVisible + 1 %}
        <span>...</span>
    {% endif %}

    <a href="{{ pageInfo.lastUrl }}">{{pageInfo.totalPages}}</a>
{% endif %}

Now this added logic will do two things:

1. If there is no gap, it won't render a thing.
2. If the gap only amounts to one page it will render a page number instead.

This results in the following:

As an added bonus: if you add the amountVisible variable on top with a default value you can put this in a twig partial which you can then easily implement on the paged view like so:

{% include 'partials/pager' with { pageInfo: pageInfo, amountVisible: 3 } %}

(Note that passing pageInfo explicitly is not required, but I do it for the sake of completeness and to prevent accidental cleanups of "unused" vars.)