🕷️ Crawler Inspector

URL Lookup

Direct Parameter Lookup

Raw Queries and Responses

1. Shard Calculation

Query:

Response:

Calculated Shard: 68 (from laksa011)

2. Crawled Status Check

Query:

curl -X POST \
  'http://laksa068.int.ahrefs:8124/' \
  -H 'Content-Type: text/plain' \
  -H 'X-ClickHouse-Database: crawler3' \
  -H 'Authorization: Basic YXBpOg==' \
  -d 'SELECT getAhrefsURLFromUnparsed(src_unparsed) AS found_url, ifNull(toUnixTimestamp(download_stamp), 0) AS crawl_time, ifNull(toUnixTimestamp(props_url_first_seen), 0) AS first_indexed_time, download_http_code AS http_code, src_unparsed AS src_unparsed, src_root_hash AS src_root_hash, history_drop_reason AS history_drop_reason, meta_title AS meta_title, meta_descriptions AS meta_descriptions, meta_canonical AS meta_canonical, ml_categories_json AS ml_categories_json, ml_types_json AS ml_types_json, ml_intent_types_json AS ml_intent_types_json, meta_language AS meta_language, attrs_author AS attrs_author, ifNull(toUnixTimestamp(attrs_publish_time), 0) AS attrs_publish_time, ifNull(toUnixTimestamp(attrs_original_publish_time), 0) AS attrs_original_publish_time, ifNull(attrs_is_republished, 0) AS attrs_is_republished, ifNull(attrs_nr_words, 0) AS attrs_nr_words, ifNull(attrs_boilerpipe_nr_words, 0) AS attrs_boilerpipe_nr_words, ifNull(body_ext_links_number, 0) AS body_ext_links_number, ifNull(body_int_links_number, 0) AS body_int_links_number, ifNull(meta_nofollow, 0) AS meta_nofollow, ifNull(meta_noarchive, 0) AS meta_noarchive, ifNull(props_was_rendered, 0) AS props_was_rendered, ifNull(src_redirect, \'\') AS src_redirect, ifNull(download_time_msec, 0) AS download_time_msec, ifNull(download_ttfb_msec, 0) AS download_ttfb_msec, ifNull(download_size, 0) AS download_size FROM crawler3.page_info_local FINAL PREWHERE int_partition_id = 74 AND (src_root_hash, src_unparsed) IN ((getAhrefsRootHashFromUnparsed(getAhrefsUnparsedNoserviceFromURL(\'https://www.intmath.com/matrices-determinants/eigenvalues-eigenvectors-calculator.php\')), getAhrefsUnparsedNoserviceFromURL(\'https://www.intmath.com/matrices-determinants/eigenvalues-eigenvectors-calculator.php\'))) FORMAT JSONEachRow'

Response:

{"found_url":"https:\/\/www.intmath.com\/matrices-determinants\/eigenvalues-eigenvectors-calculator.php","crawl_time":1779733859,"first_indexed_time":1564381052,"http_code":200,"src_unparsed":"com,intmath!www,\/matrices-determinants\/eigenvalues-eigenvectors-calculator.php s443","src_root_hash":"7687205540487634868","history_drop_reason":null,"meta_title":"Eigenvalues and eigenvectors calculator","meta_descriptions":["Eigenvalues and eigenvectors calculator. This solver handles 2x2, 3x3, 4x4 and up to 9x9 matrices."],"meta_canonical":null,"ml_categories_json":"{\"\/Science\":793,\"\/Science\/Mathematics\":790,\"\/Science\/Mathematics\/Other\":711,\"\/Computers_and_Electronics\":322,\"\/Computers_and_Electronics\/Software\":274,\"\/Computers_and_Electronics\/Software\/Software_Utilities\":147}","ml_types_json":"{\"\/Interactive_Tools\":968,\"\/Interactive_Tools\/Calculator\":967}","ml_intent_types_json":"{\"Informational\":702,\"Transactional\":330}","meta_language":"en-us","attrs_author":"Murray Bourne","attrs_publish_time":0,"attrs_original_publish_time":1564381052,"attrs_is_republished":0,"attrs_nr_words":"645","attrs_boilerpipe_nr_words":"360","body_ext_links_number":7,"body_int_links_number":34,"meta_nofollow":0,"meta_noarchive":0,"props_was_rendered":0,"src_redirect":"","download_time_msec":203,"download_ttfb_msec":202,"download_size":17624}

3. Robots.txt Check

Query:

Response:

4. Spam/Ban Check

Query:

Response:

5. Seen Status Check

ℹ️ Skipped - page is already crawled

📍

LOCATION

Host 68 · Partition 74

laksa068

7687205540487634868

📄

INDEXABLE

✅

CRAWLED

8 days ago

🤖

ROBOTS ALLOWED

Page Info Filters

Filter	Status	Condition	Details
HTTP status	PASS	`download_http_code = 200`	HTTP 200
Age cutoff	PASS	`download_stamp > now() - 6 MONTH`	0.3 months ago
History drop	PASS	`isNull(history_drop_reason)`	No drop reason
Spam/ban	PASS	`fh_dont_index != 1 AND ml_spam_score = 0`	ml_spam_score=0
Canonical	PASS	`meta_canonical IS NULL OR = '' OR = src_unparsed`	Not set

Page Details

Property

Value

URL

https://www.intmath.com/matrices-determinants/eigenvalues-eigenvectors-calculator.php

Last Crawled

2026-05-25 18:30:59 (8 days ago)

First Indexed

2019-07-29 06:17:32 (6 years ago)

HTTP Status Code

200

Content

Meta Title

Eigenvalues and eigenvectors calculator

Meta Description

Eigenvalues and eigenvectors calculator. This solver handles 2x2, 3x3, 4x4 and up to 9x9 matrices.

Meta Canonical

null

Boilerpipe Text

heavy column, fetched on demand

Markdown

heavy column, fetched on demand

Readable Markdown

heavy column, fetched on demand

ML Classification

ML Categories

/Science		79.3%
/Science/Mathematics		79.0%
/Science/Mathematics/Other		71.1%
/Computers_and_Electronics		32.2%
/Computers_and_Electronics/Software		27.4%
/Computers_and_Electronics/Software/Software_Utilities		14.7%

Raw JSON

{
    "/Science": 793,
    "/Science/Mathematics": 790,
    "/Science/Mathematics/Other": 711,
    "/Computers_and_Electronics": 322,
    "/Computers_and_Electronics/Software": 274,
    "/Computers_and_Electronics/Software/Software_Utilities": 147
}

ML Page Types

/Interactive_Tools		96.8%
/Interactive_Tools/Calculator		96.7%

Raw JSON

{
    "/Interactive_Tools": 968,
    "/Interactive_Tools/Calculator": 967
}

ML Intent Types

Informational		70.2%
Transactional		33.0%

Raw JSON

{
    "Informational": 702,
    "Transactional": 330
}

Content Metadata

Language

en-us

Author

Murray Bourne

Publish Time

not set

Original Publish Time

2019-07-29 06:17:32 (6 years ago)

Republished

Word Count (Total)

645

Word Count (Content)

360

Links

External Links

Internal Links

Technical SEO

Meta Nofollow

Meta Noarchive

JS Rendered

Redirect Target

null

Performance

Download Time (ms)

203

TTFB (ms)

202

Download Size (bytes)

17,624

Location

Host ID

68 (laksa068)

Partition ID

Root Hash

7687205540487634868

Unparsed URL

com,intmath!www,/matrices-determinants/eigenvalues-eigenvectors-calculator.php s443