Log4j-core

<dependency>
    <groupId>org.apache.logging.log4j</groupId>
    <artifactId>log4j-core</artifactId>
    <version>2.13.1</version>
</dependency>

compile group: 'org.apache.logging.log4j', name: 'log4j-core', version: '2.13.1'

compile 'org.apache.logging.log4j:log4j-core:2.13.1'

libraryDependencies += "org.apache.logging.log4j" % "log4j-core" % "2.13.1"

<dependency org="org.apache.logging.log4j" name="log4j-core" rev="2.13.1"/>

@Grapes(
            @Grab(group='org.apache.logging.log4j', module='log4j-core', version='2.13.1')
        )

[org.apache.logging.log4j/log4j-core "2.13.1"]

'org.apache.logging.log4j:log4j-core:jar:2.13.1'